/*
 *			GPAC - Multimedia Framework C SDK
 *
 *			Authors: Jean Le Feuvre
 *			Copyright (c) Telecom ParisTech 2000-2024
 *					All rights reserved
 *
 *  This file is part of GPAC / mp4box application
 *
 *  GPAC is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  GPAC is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */


#include "mp4box.h"

#include <gpac/media_tools.h>
#include <gpac/constants.h>
#include <gpac/scene_manager.h>
#include <gpac/network.h>
#include <gpac/base_coding.h>

#if !defined(GPAC_DISABLE_VRML) && !defined(GPAC_DISABLE_X3D) && !defined(GPAC_DISABLE_SVG)
#include <gpac/scenegraph.h>
#endif


#ifndef GPAC_DISABLE_BIFS
#include <gpac/bifs.h>
#endif
#ifndef GPAC_DISABLE_VRML
#include <gpac/nodes_mpeg4.h>
#endif

#ifndef GPAC_DISABLE_ISOM_WRITE

#include <gpac/xml.h>
#include <gpac/isomedia.h>

typedef struct
{
	const char *root_file;
	const char *dir;
	GF_List *imports;
} WGTEnum;

GF_Err set_file_udta(GF_ISOFile *dest, u32 tracknum, u32 udta_type, char *src, Bool is_box_array, Bool is_string)
{
	u8 *data = NULL;
	GF_Err res = GF_OK;
	u32 size;
	bin128 uuid;
	memset(uuid, 0 , 16);

	if (!udta_type && !is_box_array) return GF_BAD_PARAM;

	if (!src || !strlen(src)) {
		GF_Err e = gf_isom_remove_user_data(dest, tracknum, udta_type, uuid);
		if (e==GF_EOS) {
			e = GF_OK;
			M4_LOG(GF_LOG_WARNING, ("No track.udta found, ignoring\n"));
		}
		return e;
	}

	if (!strnicmp(src, "base64", 6)) {
		src += 7;
		size = (u32) strlen(src);
		data = gf_malloc(sizeof(char) * size);
		size = gf_base64_decode((u8 *)src, size, data, size);
	} else if (is_string) {
		data = (u8 *) src;
		size = (u32) strlen(src);
		is_box_array = 0;
	} else {
		GF_Err e = gf_file_load_data(src, (u8 **) &data, &size);
		if (e) return e;
	}

	if (size && data) {
		if (is_box_array) {
			res = gf_isom_add_user_data_boxes(dest, tracknum, data, size);
		} else {
			res = gf_isom_add_user_data(dest, tracknum, udta_type, uuid, data, size);
		}
		if (!is_string)
			gf_free(data);
	}
	return res;
}

#ifndef GPAC_DISABLE_MEDIA_IMPORT

#ifndef GPAC_DISABLE_SWF_IMPORT
extern u32 swf_flags;
#endif

extern Double swf_flatten_angle;
extern Bool keep_sys_tracks;
extern u32 fs_dump_flags;

void scene_coding_log(void *cbk, GF_LOG_Level log_level, GF_LOG_Tool log_tool, const char *fmt, va_list vlist);

GF_Err convert_file_info(char *inName, TrackIdentifier *track_id)
{
	GF_Err e;
	u32 i, cur=1;
	Bool found;
	GF_MediaImporter *import = gf_malloc(sizeof(GF_MediaImporter));
	if (!import) return GF_OUT_OF_MEM;
	memset(import, 0, sizeof(GF_MediaImporter));
	if (!track_id->type)
		import->trackID = track_id->ID_or_num;

	import->in_name = inName;
	import->flags = GF_IMPORT_PROBE_ONLY;
	import->print_stats_graph = fs_dump_flags;

	e = gf_media_import(import);
	if (e) {
		M4_LOG(GF_LOG_ERROR, ("Error probing file %s: %s\n", inName, gf_error_to_string(e)));
		gf_free(import);
		return e;
	}
	if (track_id->ID_or_num) {
		fprintf(stderr, "Import probing results for %s track %s%d:\n", inName, track_id->type ? "#" : "ID ", track_id->ID_or_num);
	} else {
		fprintf(stderr, "Import probing results for %s:\n", inName);
		if (!import->nb_tracks) {
			M4_LOG(GF_LOG_WARNING, ("File has no selectable tracks\n"));
			gf_free(import);
			return GF_OK;
		}
		fprintf(stderr, "File has %d tracks\n", import->nb_tracks);
	}
	if (import->probe_duration) {
		fprintf(stderr, "Duration: %g s\n", (Double) (import->probe_duration/1000.0));
	}
	found = 0;
	for (i=0; i<import->nb_tracks; i++) {
		u32 stype = import->tk_info[i].stream_type;
		switch (track_id->type) {
		case 0: //by trackID
			if (track_id->ID_or_num && (track_id->ID_or_num != import->tk_info[i].track_num) ) continue;
			break;
		case 1: //by track nul
			if (track_id->ID_or_num && (track_id->ID_or_num != i+1) ) continue;
			break;
		case 2: //by video
			if (stype != GF_STREAM_VISUAL) continue;
			break;
		case 3: //by audio
			if (stype != GF_STREAM_AUDIO) continue;
			break;
		case 4: //by text
			if (stype != GF_STREAM_VISUAL) continue;
			break;
		}
		if ((track_id->type>1) && track_id->ID_or_num && (track_id->ID_or_num<cur)) continue;
		cur++;

		if (!track_id->ID_or_num) fprintf(stderr, "- Track %d type: ", import->tk_info[i].track_num);
		else fprintf(stderr, "Track type: ");

		switch (stype) {
		case GF_STREAM_VISUAL:
			if (import->tk_info[i].media_subtype == GF_ISOM_MEDIA_AUXV)  fprintf(stderr, "Auxiliary Video");
			else if (import->tk_info[i].media_subtype == GF_ISOM_MEDIA_PICT)  fprintf(stderr, "Picture Sequence");
			else fprintf(stderr, "Video");
			if (import->tk_info[i].video_info.temporal_enhancement) fprintf(stderr, " Temporal Enhancement");
			break;
		case GF_STREAM_AUDIO:
			fprintf(stderr, "Audio");
			break;
		case GF_STREAM_TEXT:
			fprintf(stderr, "Text");
			break;
		case GF_STREAM_SCENE:
			fprintf(stderr, "Scene");
			break;
		case GF_STREAM_OD:
			fprintf(stderr, "OD");
			break;
		case GF_STREAM_METADATA:
			fprintf(stderr, "Metadata");
			break;
		default:
			fprintf(stderr, "Other (%s)", gf_4cc_to_str(import->tk_info[i].stream_type));
			break;
		}
		if (import->tk_info[i].codecid) fprintf(stderr, " - Codec %s", gf_codecid_name(import->tk_info[i].codecid));

		if (import->tk_info[i].lang) fprintf(stderr, " lang %s", gf_4cc_to_str(import->tk_info[i].lang));

		if (import->tk_info[i].mpeg4_es_id) fprintf(stderr, " MPEG-4 ESID %d", import->tk_info[i].mpeg4_es_id);

		if (import->tk_info[i].prog_num) {
			if (!import->nb_progs) {
				fprintf(stderr, " Program %d", import->tk_info[i].prog_num);
			} else {
				u32 j;
				for (j=0; j<import->nb_progs; j++) {
					if (import->tk_info[i].prog_num != import->pg_info[j].number) continue;
					fprintf(stderr, " Program %s", import->pg_info[j].name);
					break;
				}
			}
		}
		fprintf(stderr, "\n");

		if (import->tk_info[i].video_info.width && import->tk_info[i].video_info.height
		   ) {
			fprintf(stderr, "\tSize %dx%d", import->tk_info[i].video_info.width, import->tk_info[i].video_info.height);
			if (import->tk_info[i].video_info.FPS) fprintf(stderr, " @ %g FPS", import->tk_info[i].video_info.FPS);
			if (import->tk_info[i].stream_type==GF_STREAM_VISUAL) {
				if (import->tk_info[i].video_info.par) fprintf(stderr, " PAR: %d:%d", import->tk_info[i].video_info.par >> 16, import->tk_info[i].video_info.par & 0xFFFF);
			}

			fprintf(stderr, "\n");
		}
		else if ((import->tk_info[i].stream_type==GF_STREAM_AUDIO) && import->tk_info[i].audio_info.sample_rate) {
			fprintf(stderr, "\tSampleRate %d - %d channels\n", import->tk_info[i].audio_info.sample_rate, import->tk_info[i].audio_info.nb_channels);
		}

		if (track_id->ID_or_num || (track_id->type>1)) {
			found = 1;
			break;
		}
	}
	fprintf(stderr, "\n");

	if (!found && track_id->ID_or_num) {
		M4_LOG(GF_LOG_ERROR, ("Cannot find track %d in file\n", track_id->ID_or_num));
		return GF_BAD_PARAM;
	}
	M4_LOG(GF_LOG_INFO, ("For more details, use `gpac -i %s inspect[:deep][:analyze=on|bs]`\n", gf_file_basename(inName)));
	gf_free(import);
	return GF_OK;
}

static GF_Err set_chapter_track(GF_ISOFile *file, u32 track, u32 chapter_ref_trak)
{
	u64 ref_duration, chap_duration;
	Double scale;
	GF_Err e;

	e = gf_isom_set_track_reference(file, chapter_ref_trak, GF_ISOM_REF_CHAP, gf_isom_get_track_id(file, track) );
	if (e) return e;
	e = gf_isom_set_track_enabled(file, track, GF_FALSE);
	if (e) return e;

	ref_duration = gf_isom_get_media_duration(file, chapter_ref_trak);
	chap_duration = gf_isom_get_media_duration(file, track);
	scale = (Double) (s64) gf_isom_get_media_timescale(file, track);
	scale /= gf_isom_get_media_timescale(file, chapter_ref_trak);
	ref_duration = (u64) (ref_duration * scale);

	if (chap_duration < ref_duration) {
		chap_duration -= gf_isom_get_sample_duration(file, track, gf_isom_get_sample_count(file, track));
		chap_duration = ref_duration - chap_duration;
		e = gf_isom_set_last_sample_duration(file, track, (u32) chap_duration);
		if (e) return e;
	}
#ifdef GPAC_ENABLE_COVERAGE
	if (gf_sys_is_cov_mode()) {
		u8 NbBits;
		u32 switchGroupID, nb_crit, size, reserved;
		u8 priority;
		Bool discardable;
		GF_AudioChannelLayout layout;
		gf_isom_get_sample_size(file, track, 1);
		gf_isom_get_sample_dts(file, track, 1);
		gf_isom_get_sample_from_dts(file, track, 0);
		gf_isom_set_sample_padding(file, track, 0);
		gf_isom_has_padding_bits(file, track);
		gf_isom_get_sample_padding_bits(file, track, 1, &NbBits);
		gf_isom_keep_utc_times(file, 1);
#ifndef GPAC_DISABLE_ISOM_FRAGMENTS
		gf_isom_set_single_moof_mode(file, GF_TRUE);
		gf_isom_reset_sample_count(NULL);
		gf_isom_set_traf_mss_timeext(NULL, 0, 0, 0);
		gf_isom_get_next_moof_number(NULL);
		gf_isom_set_fragment_reference_time(NULL, 0, 0, 0, 0);
#endif
		//this one is not tested in master due to old-arch compat, to remove when we enable tests without old-arch
		gf_isom_get_audio_layout(file, track, 1, &layout);

		gf_isom_get_track_switch_parameter(file, track, 1, &switchGroupID, &nb_crit);
		gf_isom_sample_has_subsamples(file, track, 1, 0);
		gf_isom_sample_get_subsample(file, track, 1, 0, 1, &size, &priority, &reserved, &discardable);
#ifndef GPAC_DISABLE_ISOM_HINTING
		gf_isom_hint_blank_data(NULL, 0, 0);
		gf_isom_hint_sample_description_data(NULL, 0, 0, 1, 0, 0, 0);
		gf_isom_get_payt_info(NULL, 0, 0, NULL);
#endif
		gf_isom_estimate_size(file);

	}
#endif
	return GF_OK;
}

GF_Err parse_fracs(char *str, GF_Fraction64 *f, GF_Fraction64 *dur)
{
	GF_Err e = GF_OK;
	if (dur) {
		char *sep = strchr(str, '-');
		if (sep) {
			sep[0] = 0;
			if (!gf_parse_lfrac(str, f)) e = GF_BAD_PARAM;
			if (!gf_parse_lfrac(sep+1, dur)) e = GF_BAD_PARAM;
			sep[0] = '-';
			return e;
		}
		dur->num = 0;
		dur->den = 0;
	}
	if (!gf_parse_lfrac(str, f)) e = GF_BAD_PARAM;
	return e;
}

Bool scan_color(char *val, u32 *clr_prim, u32 *clr_tranf, u32 *clr_mx, Bool *clr_full_range)
{
	char *sep = strchr(val, ',');
	if (!sep) return GF_FALSE;
	sep[0] = 0;
	*clr_prim = gf_cicp_parse_color_primaries(val);
	sep[0] = ',';
	if (*clr_prim == (u32) -1) return GF_FALSE;
	val = sep+1;

	sep = strchr(val, ',');
	if (!sep) return GF_FALSE;
	sep[0] = 0;
	*clr_tranf = gf_cicp_parse_color_transfer(val);
	sep[0] = ',';
	if (*clr_tranf == (u32) -1) return GF_FALSE;
	val = sep+1;

	sep = strchr(val, ',');
	if (sep) sep[0] = 0;
	*clr_mx = gf_cicp_parse_color_matrix(val);
	if (sep) sep[0] = ',';
	if (*clr_mx == (u32) -1) return GF_FALSE;
	if (!sep) return GF_TRUE;

	val = sep+1;
	if (!strcmp(val, "yes") || !strcmp(val, "on")) {
		*clr_full_range = GF_TRUE;
		return GF_TRUE;
	}
	if (!strcmp(val, "no") || !strcmp(val, "off")) {
		*clr_full_range = GF_FALSE;
		return GF_TRUE;
	}

	if (sscanf(val, "%d", (s32*) clr_full_range) == 1)
		return GF_TRUE;

	return GF_FALSE;
}

#include <gpac/internal/media_dev.h>

static GF_Err set_dv_profile(GF_ISOFile *dest, u32 track, char *dv_profile_str)
{
	GF_Err e;
	Bool remove=GF_FALSE;
	Bool force_dv=GF_FALSE;
	u32 dv_profile = 0;
	u32 dv_compat_id=0;
	char *sep = strchr(dv_profile_str, '.');
	if (sep) {
		sep[0] = 0;
		if (!strcmp(sep+1, "none")) dv_compat_id=0;
		else if (!strcmp(sep+1, "hdr10")) dv_compat_id=1;
		else if (!strcmp(sep+1, "bt709")) dv_compat_id=2;
		else if (!strcmp(sep+1, "hlg709")) dv_compat_id=3;
		else if (!strcmp(sep+1, "hlg2100")) dv_compat_id=4;
		else if (!strcmp(sep+1, "bt2020")) dv_compat_id=5;
		else if (!strcmp(sep+1, "brd")) dv_compat_id=6;
		else if ((sep[1]>='0') && (sep[1]<='9')) dv_compat_id = parse_u32(sep+1, "DV compatibility mode");
		else {
			M4_LOG(GF_LOG_WARNING, ("DV compatibility mode %s not recognized, using none\n", sep+1));
		}
	}
	if (dv_profile_str[0]=='f') {
		force_dv = GF_TRUE;
		dv_profile_str++;
	}

	if (!strcmp(dv_profile_str, "none")) {
		remove = GF_TRUE;
	} else {
		dv_profile = parse_u32(dv_profile_str, "DV profile");
		if (dv_profile==8) {
			if ((dv_compat_id!=1) && (dv_compat_id!=2) && (dv_compat_id!=4)) {
				M4_LOG(GF_LOG_ERROR, ("DV profile 8 must indicate a compatibility mode `hdr10`, `bt709` or `hlg2100`\n"));
				return GF_BAD_PARAM;
			}
		}
	}

	GF_DOVIDecoderConfigurationRecord *dovi = gf_isom_dovi_config_get(dest, track, 1);
	if (dovi) {
		dovi->dv_profile = dv_profile;
		dovi->dv_bl_signal_compatibility_id = dv_compat_id;
		dovi->force_dv = force_dv;
		e = gf_isom_set_dolby_vision_profile(dest, track, 1, remove ? NULL : dovi);
		gf_odf_dovi_cfg_del(dovi);
		return e;
	}
	if (remove) return GF_OK;
	u32 nb_samples = gf_isom_get_sample_count(dest, track);
	if (!nb_samples) {
		M4_LOG(GF_LOG_ERROR, ("No DV config in file and no samples, cannot guess DV config\n"));
		return GF_NOT_SUPPORTED;
	}

	GF_DOVIDecoderConfigurationRecord _dovi;
	memset(&_dovi, 0, sizeof(GF_DOVIDecoderConfigurationRecord));
	_dovi.dv_version_major = 1;
	_dovi.dv_version_minor = 0;
	_dovi.dv_profile = dv_profile;
	_dovi.dv_bl_signal_compatibility_id = dv_compat_id;
	_dovi.force_dv = force_dv;

	u32 w, h;
	u32 codec_id = 0;
	u32 probe_frames=50;
	e = gf_isom_get_visual_info(dest, track, 1, &w, &h);
	if (e) return e;
	//no DV profile present in file, we need to guess
	GF_AVCConfig *avcc = gf_isom_avc_config_get(dest, track, 1);
	GF_HEVCConfig *hvcc = gf_isom_hevc_config_get(dest, track, 1);
//	GF_VVCConfig *vvcc = gf_isom_vvc_config_get(dest, track, 1);
	GF_AV1Config *av1c = gf_isom_av1_config_get(dest, track, 1);

	u32 nalu_length = 0;
	if (avcc) {
		nalu_length = avcc->nal_unit_size;
		codec_id = GF_CODECID_AVC;
		gf_odf_avc_cfg_del(avcc);
	}
	else if (hvcc) {
		codec_id = GF_CODECID_HEVC;
		nalu_length = hvcc->nal_unit_size;
		gf_odf_hevc_cfg_del(hvcc);
	}
/*	else if (vvcc) {
		codec_id = GF_CODECID_VVC;
		nalu_length = 4;
		probe_frames = 0; //parsing not supported for VVC
		gf_odf_vvc_cfg_del(vvcc);
	}
*/	else if (av1c) {
		codec_id = GF_CODECID_AV1;
		gf_odf_av1_cfg_del(av1c);
	} else {
		M4_LOG(GF_LOG_WARNING, ("DV profile can only be set on AVC, HEVC and AV1 tracks\n"));
		return GF_BAD_PARAM;
	}

	//inspect at most first 50 samples for NAL based
	u32 i;
	for (i=0; i<probe_frames; i++) {
		u32 stsd_idx;
		GF_BitStream *bs;

		GF_ISOSample *samp = gf_isom_get_sample(dest, track, i+1, &stsd_idx);
		if (!samp) break;

		bs = gf_bs_new(samp->data, samp->dataLength, GF_BITSTREAM_READ);

		while (gf_bs_available(bs)) {
			if (codec_id==GF_CODECID_AVC) {
				u32 nal_size = gf_bs_read_int(bs, nalu_length*8);
				u32 nal_type = gf_bs_read_u8(bs);
				nal_type = nal_type & 0x1F;
				nal_size--;
				if (nal_type == GF_AVC_NALU_DV_RPU) _dovi.rpu_present_flag = 1;
				else if (nal_type == GF_AVC_NALU_DV_EL) _dovi.el_present_flag = 1;
				else if (nal_type <= GF_AVC_NALU_IDR_SLICE) _dovi.bl_present_flag = 1;

				gf_bs_skip_bytes(bs, nal_size-1);
			} else if (codec_id==GF_CODECID_HEVC) {
				u32 nal_size = gf_bs_read_int(bs, nalu_length*8);
				gf_bs_read_int(bs, 1);
				u32 nal_type = gf_bs_read_int(bs, 6);
				gf_bs_read_int(bs, 1);
				nal_size--;
				if (nal_type == GF_HEVC_NALU_DV_RPU) _dovi.rpu_present_flag = 1;
				else if (nal_type == GF_HEVC_NALU_DV_EL) _dovi.el_present_flag = 1;
				else if (nal_type <= GF_HEVC_NALU_SLICE_CRA) _dovi.bl_present_flag = 1;

				gf_bs_skip_bytes(bs, nal_size-1);
			}
			else if (codec_id==GF_CODECID_AV1) {
				#ifndef GPAC_DISABLE_AV_PARSERS
					u64 obu_size, obu_start = (u32) gf_bs_get_position(bs);
					u32 obu_hdr_size;
					ObuType obu_type;
					Bool obu_extension_flag, obu_has_size_field;
					u8 temporal_id, spatial_id;

					gf_av1_parse_obu_header(bs, &obu_type, &obu_extension_flag, &obu_has_size_field, &temporal_id, &spatial_id);
					obu_hdr_size = (u32) (gf_bs_get_position(bs) - obu_start);

					if (obu_has_size_field) {
						obu_size = (u32)gf_av1_leb128_read(bs, NULL);
						obu_hdr_size = (u32) (gf_bs_get_position(bs) - obu_start);
					} else {
						obu_size = samp->dataLength - (u32) gf_bs_get_position(bs);
					}
					obu_size += obu_hdr_size;
					if (obu_type==OBU_METADATA) {
						gf_bs_seek(bs, obu_start+obu_hdr_size);
						ObuMetadataType metadata_type = (ObuMetadataType)gf_av1_leb128_read(bs, NULL);
						if (metadata_type == OBU_METADATA_TYPE_ITUT_T35) {
							//cf issue #2549
							if (gf_bs_read_u8(bs)==0xB5) {
								const u8 rpu_hdr[] = {0x00, 0x3B, 0x00, 0x00, 0x08, 0x00, 0x37, 0xCD, 0x08};
								const u32 rpu_hdr_len = sizeof (rpu_hdr);
								u32 pos = (u32) gf_bs_get_position(bs);
								u8 *t35_start = samp->data + pos;
								if (!memcmp(t35_start, rpu_hdr, rpu_hdr_len)) {
									_dovi.rpu_present_flag = 1;
								}
							}
						}
					} else if (obu_type<=OBU_TILE_LIST) {
						_dovi.bl_present_flag = 1;
					}
					gf_bs_seek(bs, obu_start+obu_size);
				#else
					return GF_NOT_SUPPORTED;
				#endif
			}
		}
		gf_bs_del(bs);
		gf_isom_sample_del(&samp);
	}

	//get dur and timescale to compute fps
	//we don't divide mdur by nb_samples but rather multiple timescale with nb_samples
	//this avoids rounding errors with non FPS-aligned input timescale (eg mkv using 1000 regardless of FPS)
	u64 mdur;
	u64 timescale = gf_isom_get_media_timescale(dest, track);
	mdur = gf_isom_get_media_duration(dest, track);
	if (timescale % 1000 == 0) {
		timescale/=1000;
		mdur/=1000;
	}
	else if (timescale % 1001 == 0) {
		timescale/=1001;
		mdur/=1001;
	}
	timescale *= nb_samples;

	_dovi.dv_level = gf_dolby_vision_level(w, h, timescale, mdur, codec_id);
	return gf_isom_set_dolby_vision_profile(dest, track, 1, &_dovi);
}



GF_Err apply_edits(GF_ISOFile *dest, u32 track, char *edits)
{
	u32 movie_ts = gf_isom_get_timescale(dest);
	u32 media_ts = gf_isom_get_media_timescale(dest, track);
	u64 media_dur = gf_isom_get_media_duration(dest, track);
	if (!movie_ts) movie_ts = 600;
	if (!media_ts) media_ts = movie_ts;

	while (edits) {
		GF_Err e;
		char c=0;
		char *sep = strchr(edits+1, 'r');
		if (!sep) sep = strchr(edits+1, 'e');
		if (sep) {
			c = sep[0];
			sep[0] = 0;
		}

		//remove all edits
		if (edits[0] == 'r') {
			e = gf_isom_remove_edits(dest, track);
			if (e) goto error;
		}
		else if (edits[0]=='e') {
			u64 movie_t, edur;
			GF_Fraction64 movie_time, media_time, media_rate, edit_dur;
			char *mtime_sep;

			edits+=1;
			mtime_sep = strchr(edits, ',');
			movie_time.den = media_time.den = media_rate.den = 0;
			if (!mtime_sep) {
				e = parse_fracs(edits, &movie_time, &edit_dur);
				if (e) goto error;
			}
			else {
				mtime_sep[0] = 0;
				e = parse_fracs(edits, &movie_time, &edit_dur);
				if (e) goto error;
				mtime_sep[0] = ',';
				edits = mtime_sep+1;
				mtime_sep = strchr(edits, ',');
				if (!mtime_sep) {
					e = parse_fracs(edits, &media_time, NULL);
					if (e) goto error;
					media_rate.num = media_rate.den = 1;
				} else {
					mtime_sep[0] = 0;
					e = parse_fracs(edits, &media_time, NULL);
					if (e) goto error;
					mtime_sep[0] = ',';
					e = parse_fracs(mtime_sep+1, &media_rate, NULL);
					if (e) goto error;
				}
			}
			if (!movie_time.den || (movie_time.num<0)) {
				e = GF_BAD_PARAM;
				fprintf(stderr, "Wrong edit format %s, movie time must be valid and >= 0\n", edits);
				goto error;
			}
			movie_t = movie_time.num * movie_ts / movie_time.den;
			if (!edit_dur.den || !edit_dur.num) {
				edur = gf_timestamp_rescale(media_dur, media_ts, movie_ts);
			} else {
				edur = gf_timestamp_rescale(edit_dur.num, edit_dur.den, movie_ts);
			}
			//empty edit
			if (!media_time.den) {
				e = gf_isom_set_edit(dest, track, movie_t, edur, 0, GF_ISOM_EDIT_EMPTY);
			} else {
				//adjust media duration based on media time
				u64 media_t = media_time.num * media_ts / media_time.den;
				if (media_dur<media_t) {
					fprintf(stderr, "Media time "LLU" larger than duration "LLU", using last media frame\n", media_t, media_dur);
					media_t = media_dur;
					media_dur = 0;
				} else {
					media_dur -= media_t;
				}
				u32 rate = 0;
				if (media_rate.den) {
					u64 frac;
					rate = (u32) ( media_rate.num / media_rate.den );
					frac = media_rate.num - rate*media_rate.den;
					frac *= 0xFFFF;
					frac /= media_rate.den;
					rate = (rate<<16) | (u16) frac;
					//adjust media dur if rate > 1
					if (media_rate.num > (s64) media_rate.den) {
						media_dur = media_dur*media_rate.den / media_rate.num;
					}
				}
				//clamp edit dur to available media time
				if (gf_timestamp_greater(edur, movie_ts, media_dur, media_ts)) {
					u64 ndur = gf_timestamp_rescale(media_dur, media_ts, movie_ts);
					fprintf(stderr, "Clamping edit duration from "LLU"/%u to "LLU"/%u due to available media duration "LLU"/%u\n", edur, movie_ts, ndur, movie_ts, media_dur, media_ts);
					edur = ndur;
				}

				e = gf_isom_set_edit_with_rate(dest, track, movie_t, edur, media_t, rate);
			}
			if (e==GF_EOS) {
				fprintf(stderr, "Inserted empty edit before edit at start time "LLD"/"LLU"\n", movie_time.num, movie_time.den);
				e = GF_OK;
			}
			if (e) goto error;
		} else {
			e = GF_BAD_PARAM;
			fprintf(stderr, "Wrong edit format %s, should start with 'e' or 'r'\n", edits);
			goto error;
		}
error:
		if (sep) sep[0] = c;
		if (e) return e;

		if (!sep) break;
		edits = sep;
	}
	return GF_OK;
}

static const char *videofmt_names[] = { "component", "pal", "ntsc", "secam", "mac", "undef"};
static GF_Err apply_timestamps(GF_ISOFile *file, GF_ISOTrackID trackID, const char *timestamp_source);


GF_Err import_file(GF_ISOFile *dest, char *inName, u32 import_flags, GF_Fraction force_fps, u32 frames_per_sample, GF_FilterSession *fsess, char **mux_args_if_first_pass, char **mux_sid_if_first_pass, u32 tk_idx)
{
	u32 track_id, i, j, timescale, track, stype, profile, compat, level, new_timescale, rescale_num, rescale_den, svc_mode, txt_flags, split_tile_mode, temporal_mode, nb_tracks;
	s32 par_d, par_n, prog_id, force_rate, moov_timescale;
	s32 tw, th, tx, ty, tz, txtw, txth, txtx, txty;
	Bool do_audio, do_video, do_auxv,do_pict, do_all, track_layout, text_layout, chap_ref, is_chap, is_chap_file, keep_handler, rap_only, refs_only, force_par, rewrite_bs;
	u32 group, handler, rvc_predefined, check_track_for_svc, check_track_for_lhvc, check_track_for_hevc, do_disable;
	const char *szLan;
	GF_Err e = GF_OK;
	GF_Fraction delay;
	u32 tmcd_track = 0, neg_ctts_mode=0;
	Bool keep_audelim = GF_FALSE;
	u32 print_stats_graph=fs_dump_flags;
	char *ext, *final_name=NULL, *handler_name, *rvc_config, *chapter_name;
	GF_List *kinds = NULL;
	GF_TextFlagsMode txt_mode = GF_ISOM_TEXT_FLAGS_OVERWRITE;
	u8 max_layer_id_plus_one, max_temporal_id_plus_one;
	u32 clap_wn, clap_wd, clap_hn, clap_hd, clap_hon, clap_hod, clap_von, clap_vod;
	Bool has_clap=GF_FALSE;
	Bool use_stz2=GF_FALSE;
	Bool has_mx=GF_FALSE;
	s32 mx[9];
	u32 bitdepth=0;
	char dv_profile[100]; /*Dolby Vision*/
	u32 clr_type=0;
	u32 clr_prim;
	u32 clr_tranf;
	u32 clr_mx;
	Bool rescale_override=GF_FALSE;
	Bool clr_full_range=GF_FALSE;
	Bool fmt_ok = GF_TRUE;
	u32 icc_size=0, track_flags=0;
	u8 *icc_data = NULL;
	u32 tc_fps_num=0, tc_fps_den=0, tc_h=0, tc_m=0, tc_s=0, tc_f=0, tc_frames_per_tick=0;
	Bool tc_force_counter=GF_FALSE;
	Bool tc_drop_frame = GF_FALSE;
	char *ext_start;
	u32 xps_inband=0;
	u64 source_magic=0;
	char *opt_src = NULL;
	char *opt_dst = NULL;
	char *fchain = NULL;
	char *edits = NULL;
	const char *fail_msg = NULL;
	char *hdr_file=NULL;
	char *first_ext=NULL;
	char *timestamp_source=NULL;
	Bool set_ccst=GF_FALSE;
	Bool has_last_sample_dur=GF_FALSE;
	u32 fake_import = 0;
	GF_Fraction last_sample_dur = {0,0};
	s32 fullrange, videofmt, colorprim, colortfc, colormx;
	clap_wn = clap_wd = clap_hn = clap_hd = clap_hon = clap_hod = clap_von = clap_vod = 0;
	GF_ISOMTrackFlagOp track_flags_mode=0;
	u32 roll_change=0;
	s32 roll = 0;
	Bool src_is_isom = GF_FALSE;
	s32 dlb_mode = -2;
	u32 tkgp_type=0;
	s32 tkgp_id=0;
	Bool tkgp_add = GF_TRUE;
	u32 is_extk = 0;
	u32 set_tk_idx=0;
	u32 *reorder_tk_ids = NULL;
	u32 reorder_tk_ids_count = 0;
	Bool has_non_extk_opt=GF_FALSE;
	GF_MediaImporter *import = NULL;

	dv_profile[0] = 0;
	rvc_predefined = 0;
	chapter_name = NULL;
	new_timescale = 1;
	moov_timescale = 0;
	rescale_num = rescale_den = 0;
	text_layout = 0;
	/*0: merge all
	  1: split base and all SVC in two tracks
	  2: split all base and SVC layers in dedicated tracks
	 */
	svc_mode = 0;

	if (import_flags==0xFFFFFFFF) {
		import_flags = 0;
		fake_import = 1;
	}
	import = gf_malloc(sizeof(GF_MediaImporter));
	if (!import) {
		e = GF_OUT_OF_MEM;
		goto exit;
	}
	memset(import, 0, sizeof(GF_MediaImporter));

	final_name = gf_strdup(inName);
#ifdef WIN32
	/*dirty hack for msys&mingw: when we use import options, the ':' separator used prevents msys from translating the path
	we do this for regular cases where the path starts with the drive letter. If the path start with anything else (/home , /opt, ...) we're screwed :( */
	if ( (final_name[0]=='/') && (final_name[2]=='/')) {
		final_name[0] = final_name[1];
		final_name[1] = ':';
	}
#endif

	is_chap_file = 0;
	handler = 0;
	do_disable = 0;
	chap_ref = 0;
	is_chap = 0;
	kinds = gf_list_new();
	track_layout = 0;
	szLan = NULL;
	delay.num = delay.den = 0;
	group = 0;
	stype = 0;
	profile = compat = level = 0;
	fullrange = videofmt = colorprim = colortfc = colormx = -1;
	split_tile_mode = 0;
	temporal_mode = 0;
	rap_only = 0;
	refs_only = 0;
	txt_flags = 0;
	max_layer_id_plus_one = max_temporal_id_plus_one = 0;
	force_rate = -1;

	tw = th = tx = ty = tz = txtw = txth = txtx = txty = 0;
	par_d = par_n = -1;
	force_par = rewrite_bs = GF_FALSE;

	ext_start = gf_file_ext_start(final_name);
	ext = strrchr(ext_start ? ext_start : final_name, '#');
	if (!ext) ext = gf_url_colon_suffix(final_name, '=');
	char c_sep = ext ? ext[0] : 0;
	if (ext) ext[0] = 0;

	char *frag = strrchr(final_name, '#');
	if (frag) frag[0] = 0;

 	if (!strlen(final_name) || !strcmp(final_name, "self")) {
		fake_import = 2;
		src_is_isom = GF_TRUE;
	}
	else if (gf_isom_probe_file(final_name))
		src_is_isom = GF_TRUE;

	if (frag) frag[0] = '#';

	if (ext) ext[0] = c_sep;

reparse_opts:
	ext = gf_url_colon_suffix(final_name, '=');

#define GOTO_EXIT(_msg) if (e) { fail_msg = _msg; goto exit; }

#define CHECK_FAKEIMPORT(_opt) if (fake_import) { M4_LOG(GF_LOG_ERROR, ("Option %s not available for cat or self-reference import\n", _opt)); e = GF_BAD_PARAM; goto exit; }
#define CHECK_FAKEIMPORT_2(_opt) if (fake_import==1) { M4_LOG(GF_LOG_ERROR, ("Option %s not available for cat or self-reference import\n", _opt)); e = GF_BAD_PARAM; goto exit; }


	handler_name = NULL;
	rvc_config = NULL;
	while (ext) {
		char *ext2 = gf_url_colon_suffix(ext+1, '=');

		if (ext2) ext2[0] = 0;

		/*all extensions for track-based importing*/
		if (!strnicmp(ext+1, "dur=", 4)) {
			CHECK_FAKEIMPORT("dur")

			if (strchr(ext, '-')) {
				import->duration.num = parse_s32(ext+5, "dur");
				import->duration.den = 1;
			} else {
				gf_parse_frac(ext+5, &import->duration);
			}
		}
		else if (!strnicmp(ext+1, "start=", 6)) {
			CHECK_FAKEIMPORT("start")
			import->start_time = atof(ext+7);
		}
		else if (!strnicmp(ext+1, "lang=", 5)) {
			/* prevent leak if param is set twice */
			if (szLan)
				gf_free((char*) szLan);

			szLan = gf_strdup(ext+6);
		}
		else if (!strnicmp(ext+1, "delay=", 6)) {
			if (sscanf(ext+7, "%d/%u", &delay.num, &delay.den)!=2) {
				delay.num = parse_s32(ext+7, "delay");
				delay.den = 1000; //in ms
			}
		}
		else if (!strnicmp(ext+1, "par=", 4)) {
			if (!stricmp(ext + 5, "none")) {
				par_n = par_d = 0;
			} else if (!stricmp(ext + 5, "auto")) {
				force_par = GF_TRUE;
			} else if (!stricmp(ext + 5, "force")) {
				par_n = par_d = 1;
				force_par = GF_TRUE;
			} else {
				if (ext2) {
					ext2[0] = ':';
					ext2 = strchr(ext2+1, ':');
					if (ext2) ext2[0] = 0;
				}
				if (ext[5]=='w') {
					rewrite_bs = GF_TRUE;
					if (sscanf(ext+6, "%d:%d", &par_n, &par_d)!=2) {
						M4_LOG(GF_LOG_ERROR, ("Unrecognized syntax for par=, expecting N:D got %s\n", ext+5));
						e = GF_BAD_PARAM;
						goto exit;
					}
				} else {
					if (sscanf(ext+5, "%d:%d", &par_n, &par_d) != 2) {
						M4_LOG(GF_LOG_ERROR, ("Unrecognized syntax for par=, expecting N:D got %s\n", ext+5));
						e = GF_BAD_PARAM;
						goto exit;
					}
				}
			}
		}
		else if (!strnicmp(ext+1, "clap=", 5)) {
			if (!stricmp(ext+6, "none")) {
				has_clap=GF_TRUE;
			} else {
				if (sscanf(ext+6, "%d,%d,%d,%d,%d,%d,%d,%d", &clap_wn, &clap_wd, &clap_hn, &clap_hd, &clap_hon, &clap_hod, &clap_von, &clap_vod)==8) {
					has_clap=GF_TRUE;
				}
			}
		}
		else if (!strnicmp(ext+1, "mx=", 3)) {
			if (strstr(ext+4, "0x")) {
				if (sscanf(ext+4, "0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%x,0x%d", &mx[0], &mx[1], &mx[2], &mx[3], &mx[4], &mx[5], &mx[6], &mx[7], &mx[8])==9) {
					has_mx=GF_TRUE;
				}
			} else if (sscanf(ext+4, "%d,%d,%d,%d,%d,%d,%d,%d,%d", &mx[0], &mx[1], &mx[2], &mx[3], &mx[4], &mx[5], &mx[6], &mx[7], &mx[8])==9) {
				has_mx=GF_TRUE;
			}
		}
		else if (!strnicmp(ext+1, "name=", 5)) {
			handler_name = gf_strdup(ext+6);
		}
		else if (!strnicmp(ext+1, "ext=", 4)) {
			CHECK_FAKEIMPORT("ext")
			/*extensions begin with '.'*/
			if (*(ext+5) == '.')
				import->force_ext = gf_strdup(ext+5);
			else {
				import->force_ext = gf_calloc(1+strlen(ext+5)+1, 1);
				import->force_ext[0] = '.';
				strcat(import->force_ext+1, ext+5);
			}
		}
		else if (!strnicmp(ext+1, "hdlr=", 5)) handler = GF_4CC(ext[6], ext[7], ext[8], ext[9]);
		else if (!strnicmp(ext+1, "stype=", 6)) stype = GF_4CC(ext[7], ext[8], ext[9], ext[10]);
		else if (!strnicmp(ext+1, "tkhd", 4)) {
			char *flags = ext+6;
			if (flags[0]=='+') { track_flags_mode = GF_ISOM_TKFLAGS_ADD; flags += 1; }
			else if (flags[0]=='-') { track_flags_mode = GF_ISOM_TKFLAGS_REM; flags += 1; }
			else track_flags_mode = GF_ISOM_TKFLAGS_SET;

			if (strstr(flags, "enable")) track_flags |= GF_ISOM_TK_ENABLED;
			if (strstr(flags, "movie")) track_flags |= GF_ISOM_TK_IN_MOVIE;
			if (strstr(flags, "preview")) track_flags |= GF_ISOM_TK_IN_PREVIEW;
			if (strstr(flags, "size_ar")) track_flags |= GF_ISOM_TK_SIZE_IS_AR;
			if (!track_flags) {
				if (!strnicmp(flags, "0x", 2)) flags += 2;
				sscanf(flags, "%X", &track_flags);
			}
		} else if (!strnicmp(ext+1, "disable", 7)) {
			do_disable = !stricmp(ext+1, "disable=no") ? 2 : 1;
		}
		else if (!strnicmp(ext+1, "group=", 6)) {
			group = parse_u32(ext+7, "group");
			if (!group) group = gf_isom_get_next_alternate_group_id(dest);
		}
		else if (!strnicmp(ext+1, "fps=", 4)) {
			u32 ticks, dts_inc;
			if (!strcmp(ext+5, "auto")) {
				M4_LOG(GF_LOG_ERROR, ("Warning, fps=auto option is deprecated\n"));
			} else if ((sscanf(ext+5, "%u-%u", &ticks, &dts_inc) == 2) || (sscanf(ext+5, "%u/%u", &ticks, &dts_inc) == 2)) {
				if (!dts_inc) dts_inc=1;
				force_fps.num = ticks;
				force_fps.den = dts_inc;
			} else {
				if (gf_sys_old_arch_compat()) {
					force_fps.den = 1000;
					force_fps.num = (u32) (atof(ext+5) * force_fps.den);
				} else {
					gf_parse_frac(ext+5, &force_fps);
				}
			}
		}
		else if (!stricmp(ext+1, "rap")) rap_only = 1;
		else if (!stricmp(ext+1, "refs")) refs_only = 1;
		else if (!stricmp(ext+1, "trailing")) { CHECK_FAKEIMPORT("trailing") import_flags |= GF_IMPORT_KEEP_TRAILING; }
		else if (!strnicmp(ext+1, "agg=", 4)) { CHECK_FAKEIMPORT("agg") frames_per_sample = parse_u32(ext+5, "agg"); }
		else if (!stricmp(ext+1, "dref")) { CHECK_FAKEIMPORT("dref")  import_flags |= GF_IMPORT_USE_DATAREF; }
		else if (!stricmp(ext+1, "keep_refs")) { CHECK_FAKEIMPORT("keep_refs") import_flags |= GF_IMPORT_KEEP_REFS; }
		else if (!stricmp(ext+1, "nodrop")) { CHECK_FAKEIMPORT("nodrop") import_flags |= GF_IMPORT_NO_FRAME_DROP; }
		else if (!stricmp(ext+1, "packed")) { CHECK_FAKEIMPORT("packed") import_flags |= GF_IMPORT_FORCE_PACKED; }
		else if (!stricmp(ext+1, "sbr")) { CHECK_FAKEIMPORT("sbr") import_flags |= GF_IMPORT_SBR_IMPLICIT; }
		else if (!stricmp(ext+1, "sbrx")) { CHECK_FAKEIMPORT("sbrx") import_flags |= GF_IMPORT_SBR_EXPLICIT; }
		else if (!stricmp(ext+1, "ovsbr")) { CHECK_FAKEIMPORT("ovsbr") import_flags |= GF_IMPORT_OVSBR; }
		else if (!stricmp(ext+1, "ps")) { CHECK_FAKEIMPORT("ps") import_flags |= GF_IMPORT_PS_IMPLICIT; }
		else if (!stricmp(ext+1, "psx")) { CHECK_FAKEIMPORT("psx") import_flags |= GF_IMPORT_PS_EXPLICIT; }
		else if (!stricmp(ext+1, "mpeg4")) { CHECK_FAKEIMPORT("mpeg4") import_flags |= GF_IMPORT_FORCE_MPEG4; }
		else if (!stricmp(ext+1, "nosei")) { CHECK_FAKEIMPORT("nosei") import_flags |= GF_IMPORT_NO_SEI; }
		else if (!stricmp(ext+1, "svc") || !stricmp(ext+1, "lhvc") ) { CHECK_FAKEIMPORT("svc/lhvc") import_flags |= GF_IMPORT_SVC_EXPLICIT; }
		else if (!stricmp(ext+1, "nosvc") || !stricmp(ext+1, "nolhvc")) { CHECK_FAKEIMPORT("nosvc/nolhvc") import_flags |= GF_IMPORT_SVC_NONE; }
		else if (!stricmp(ext+1, "extk")) {
			if (!src_is_isom) {
				M4_LOG(GF_LOG_ERROR, ("extk option can only be used with ISOBMF/QT files\n"));
				e = GF_BAD_PARAM;
				goto exit;
			}
			if (!is_extk) is_extk = 1;
		}
		/*split SVC layers*/
		else if (!strnicmp(ext+1, "svcmode=", 8) || !strnicmp(ext+1, "lhvcmode=", 9)) {
			char *mode = ext+9;
			CHECK_FAKEIMPORT_2("svcmode/lhvcmode")
			if (mode[0]=='=') mode = ext+10;

			if (!stricmp(mode, "splitnox"))
				svc_mode = 3;
			else if (!stricmp(mode, "splitnoxib"))
				svc_mode = 4;
			else if (!stricmp(mode, "splitall") || !stricmp(mode, "split"))
				svc_mode = 2;
			else if (!stricmp(mode, "splitbase"))
				svc_mode = 1;
			else if (!stricmp(mode, "merged") || !stricmp(mode, "merge"))
				svc_mode = 0;
		}
		/*split SHVC temporal sublayers*/
		else if (!strnicmp(ext+1, "temporal=", 9)) {
			char *mode = ext+10;
			CHECK_FAKEIMPORT_2("svcmode/lhvcmode")
			if (!stricmp(mode, "split"))
				temporal_mode = 2;
			else if (!stricmp(mode, "splitnox"))
				temporal_mode = 3;
			else if (!stricmp(mode, "splitbase"))
				temporal_mode = 1;
			else {
				M4_LOG(GF_LOG_ERROR, ("Unrecognized temporal mode %s, ignoring\n", mode));
				temporal_mode = 0;
			}
		}
		else if (!stricmp(ext+1, "subsamples")) { CHECK_FAKEIMPORT("subsamples") import_flags |= GF_IMPORT_SET_SUBSAMPLES; }
		else if (!stricmp(ext+1, "deps")) { CHECK_FAKEIMPORT("deps") import_flags |= GF_IMPORT_SAMPLE_DEPS; }
		else if (!stricmp(ext+1, "ccst")) { CHECK_FAKEIMPORT("ccst") set_ccst = GF_TRUE; }
		else if (!stricmp(ext+1, "alpha")) { CHECK_FAKEIMPORT("alpha") import->is_alpha = GF_TRUE; }
		else if (!stricmp(ext+1, "forcesync")) { CHECK_FAKEIMPORT("forcesync") import_flags |= GF_IMPORT_FORCE_SYNC; }
		else if (!stricmp(ext+1, "xps_inband")) { CHECK_FAKEIMPORT("xps_inband") xps_inband = 1; }
		else if (!stricmp(ext+1, "xps_inbandx")) { CHECK_FAKEIMPORT("xps_inbandx") xps_inband = 2; }
		else if (!stricmp(ext+1, "au_delim")) { CHECK_FAKEIMPORT("au_delim") keep_audelim = GF_TRUE; }
		else if (!strnicmp(ext+1, "max_lid=", 8) || !strnicmp(ext+1, "max_tid=", 8)) {
			s32 val = parse_u32(ext+9, "Max TID/LID");
			CHECK_FAKEIMPORT_2("max_lid/lhvcmode")
			if (val < 0) {
				M4_LOG(GF_LOG_ERROR, ("Warning: request max layer/temporal id is negative - ignoring\n"));
			} else {
				if (!strnicmp(ext+1, "max_lid=", 8))
					max_layer_id_plus_one = 1 + (u8) val;
				else
					max_temporal_id_plus_one = 1 + (u8) val;
			}
		}
		else if (!stricmp(ext+1, "tiles")) { CHECK_FAKEIMPORT_2("tiles") split_tile_mode = 2; }
		else if (!stricmp(ext+1, "tiles_rle")) { CHECK_FAKEIMPORT_2("tiles_rle") split_tile_mode = 3; }
		else if (!stricmp(ext+1, "split_tiles")) { CHECK_FAKEIMPORT_2("split_tiles") split_tile_mode = 1; }

		/*force all composition offsets to be positive*/
		else if (!strnicmp(ext+1, "negctts", 7)) {
			neg_ctts_mode = !strnicmp(ext+1, "negctts=no", 10) ? 2 : 1;
		}
		else if (!stricmp(ext+1, "chap")) is_chap = 1;
		else if (!strnicmp(ext+1, "chapter=", 8)) {
			chapter_name = gf_strdup(ext+9);
		}
		else if (!strnicmp(ext+1, "chapfile=", 9)) {
			chapter_name = gf_strdup(ext+10);
			is_chap_file=1;
		}
		else if (!strnicmp(ext+1, "layout=", 7)) {
			track_layout = 1;
			if ( sscanf(ext+13, "%dx%dx%dx%dx%d", &tw, &th, &tx, &ty, &tz)==5) {
			} else if ( sscanf(ext+13, "%dx%dx%dx%d", &tw, &th, &tx, &ty)==4) {
				tz = 0;
			} else if ( sscanf(ext+13, "%dx%dx%d", &tw, &th, &tz)==3) {
				tx = ty = 0;
			} else if ( sscanf(ext+8, "%dx%d", &tw, &th)==2) {
				tx = ty = tz = 0;
			}
		}

		else if (!strnicmp(ext+1, "rescale=", 8)) {
			if (sscanf(ext+9, "%u/%u", &rescale_num, &rescale_den) != 2) {
				rescale_num = parse_u32(ext+9, "rescale");
				rescale_den = 0;
			}
		}
		else if (!strnicmp(ext+1, "sampdur=", 8)) {
			if (sscanf(ext+9, "%u/%u", &rescale_den, &rescale_num) != 2) {
				rescale_den = parse_u32(ext+9, "sampdur");
				rescale_num = 0;
			}
			rescale_override = GF_TRUE;
		}
		else if (!strnicmp(ext+1, "timescale=", 10)) {
			new_timescale = parse_u32(ext+11, "timescale");
		}
		else if (!strnicmp(ext+1, "moovts=", 7)) {
			moov_timescale = parse_u32(ext+8, "moovts");
		}

		else if (!stricmp(ext+1, "noedit")) { import_flags |= GF_IMPORT_NO_EDIT_LIST; }


		else if (!strnicmp(ext+1, "rvc=", 4)) {
			if (sscanf(ext+5, "%d", &rvc_predefined) != 1) {
				rvc_config = gf_strdup(ext+5);
			}
		}
		else if (!strnicmp(ext+1, "fmt=", 4)) import->streamFormat = gf_strdup(ext+5);

		else if (!strnicmp(ext+1, "profile=", 8)) {
			if (!stricmp(ext+9, "high444")) profile = 244;
			else if (!stricmp(ext+9, "high")) profile = 100;
			else if (!stricmp(ext+9, "extended")) profile = 88;
			else if (!stricmp(ext+9, "main")) profile = 77;
			else if (!stricmp(ext+9, "baseline")) profile = 66;
			else profile = parse_u32(ext+9, "profile");
		}
		else if (!strnicmp(ext+1, "level=", 6)) {
			if( atof(ext+7) < 6 )
				level = (int)(10*atof(ext+7)+.5);
			else
				level = parse_u32(ext+7, "level");
		}
		else if (!strnicmp(ext+1, "compat=", 7)) {
			compat = parse_u32(ext+8, "compat");
		}
		else if (!strnicmp(ext+1, "dlba=", 5)) {
			if (!strcmp(ext+6, "no")) dlb_mode=0;
			else if (!strcmp(ext+6, "auto")) dlb_mode=-1;
			else if (sscanf(ext+6, "%d", &dlb_mode) != 1) {
				GOTO_EXIT("Unrecognized dolby atmos mode")
			}
		}

		else if (!strnicmp(ext+1, "novpsext", 8)) { CHECK_FAKEIMPORT("novpsext") import_flags |= GF_IMPORT_NO_VPS_EXTENSIONS; }
		else if (!strnicmp(ext+1, "keepav1t", 8)) { CHECK_FAKEIMPORT("keepav1t") import_flags |= GF_IMPORT_KEEP_AV1_TEMPORAL_OBU; }

		else if (!strnicmp(ext+1, "font=", 5)) { CHECK_FAKEIMPORT("font") import->fontName = gf_strdup(ext+6); }
		else if (!strnicmp(ext+1, "size=", 5)) { CHECK_FAKEIMPORT("size") import->fontSize = parse_u32(ext+6, "size"); }
		else if (!strnicmp(ext+1, "text_layout=", 12)) {
			if ( sscanf(ext+13, "%dx%dx%dx%d", &txtw, &txth, &txtx, &txty)==4) {
				text_layout = 1;
			} else if ( sscanf(ext+8, "%dx%d", &txtw, &txth)==2) {
				track_layout = 1;
				txtx = txty = 0;
			}
		}

#ifndef GPAC_DISABLE_SWF_IMPORT
		else if (!stricmp(ext+1, "swf-global")) { CHECK_FAKEIMPORT("swf-global") import->swf_flags |= GF_SM_SWF_STATIC_DICT; }
		else if (!stricmp(ext+1, "swf-no-ctrl")) { CHECK_FAKEIMPORT("swf-no-ctrl") import->swf_flags &= ~GF_SM_SWF_SPLIT_TIMELINE; }
		else if (!stricmp(ext+1, "swf-no-text")) { CHECK_FAKEIMPORT("swf-no-text") import->swf_flags |= GF_SM_SWF_NO_TEXT; }
		else if (!stricmp(ext+1, "swf-no-font")) { CHECK_FAKEIMPORT("swf-no-font") import->swf_flags |= GF_SM_SWF_NO_FONT; }
		else if (!stricmp(ext+1, "swf-no-line")) { CHECK_FAKEIMPORT("swf-no-line") import->swf_flags |= GF_SM_SWF_NO_LINE; }
		else if (!stricmp(ext+1, "swf-no-grad")) { CHECK_FAKEIMPORT("swf-no-grad") import->swf_flags |= GF_SM_SWF_NO_GRADIENT; }
		else if (!stricmp(ext+1, "swf-quad")) { CHECK_FAKEIMPORT("swf-quad") import->swf_flags |= GF_SM_SWF_QUAD_CURVE; }
		else if (!stricmp(ext+1, "swf-xlp")) { CHECK_FAKEIMPORT("swf-xlp") import->swf_flags |= GF_SM_SWF_SCALABLE_LINE; }
		else if (!stricmp(ext+1, "swf-ic2d")) { CHECK_FAKEIMPORT("swf-ic2d") import->swf_flags |= GF_SM_SWF_USE_IC2D; }
		else if (!stricmp(ext+1, "swf-same-app")) { CHECK_FAKEIMPORT("swf-same-app") import->swf_flags |= GF_SM_SWF_REUSE_APPEARANCE; }
		else if (!strnicmp(ext+1, "swf-flatten=", 12)) { CHECK_FAKEIMPORT("swf-flatten") import->swf_flatten_angle = (Float) atof(ext+13); }
#endif

		else if (!strnicmp(ext+1, "kind=", 5)) {
			char *kind_scheme, *kind_value;
			char *kind_data = ext+6;
			char *sep = strchr(kind_data, '=');
			if (sep) {
				*sep = 0;
			}
			kind_scheme = gf_strdup(kind_data);
			if (sep) {
				*sep = '=';
				kind_value = gf_strdup(sep+1);
			} else {
				kind_value = NULL;
			}
			gf_list_add(kinds, kind_scheme);
			gf_list_add(kinds, kind_value);
		}
		else if (!strnicmp(ext+1, "txtflags", 8)) {
			if (!strnicmp(ext+1, "txtflags=", 9)) {
				sscanf(ext+10, "%x", &txt_flags);
			}
			else if (!strnicmp(ext+1, "txtflags+=", 10)) {
				sscanf(ext+11, "%x", &txt_flags);
				txt_mode = GF_ISOM_TEXT_FLAGS_TOGGLE;
			}
			else if (!strnicmp(ext+1, "txtflags-=", 10)) {
				sscanf(ext+11, "%x", &txt_flags);
				txt_mode = GF_ISOM_TEXT_FLAGS_UNTOGGLE;
			}
		}
		else if (!strnicmp(ext+1, "rate=", 5)) {
			force_rate = parse_s32(ext+6, "rate");
		}
		else if (!strnicmp(ext+1, "times=", 6)) {
			timestamp_source = gf_strdup(ext+7);
		}
		else if (!stricmp(ext+1, "stats") || !stricmp(ext+1, "fstat"))
			print_stats_graph |= 1;
		else if (!stricmp(ext+1, "graph") || !stricmp(ext+1, "graph"))
			print_stats_graph |= 2;
		else if (!strncmp(ext+1, "sopt", 4) || !strncmp(ext+1, "dopt", 4) || !strncmp(ext+1, "@", 1)) {
			if (ext2) ext2[0] = ':';
			opt_src = strstr(ext, ":sopt:");
			opt_dst = strstr(ext, ":dopt:");
			fchain = strstr(ext, ":@");
			if (opt_src) opt_src[0] = 0;
			if (opt_dst) opt_dst[0] = 0;
			if (fchain) fchain[0] = 0;

			if (opt_src) import->filter_src_opts = opt_src+6;
			if (opt_dst) import->filter_dst_opts = opt_dst+6;
			if (fchain) {
				//check for old syntax (0.9->1.0) :@@
				if (fchain[2]=='@') {
					import->filter_chain = fchain + 3;
					import->is_chain_old_syntax = GF_TRUE;
				} else {
					import->filter_chain = fchain + 2;
					import->is_chain_old_syntax = GF_FALSE;
				}
			}

			ext = NULL;
			break;
		}

		else if (!strnicmp(ext+1, "asemode=", 8)){
			char *mode = ext+9;
			if (!stricmp(mode, "v0-bs"))
				import->asemode = GF_IMPORT_AUDIO_SAMPLE_ENTRY_v0_BS;
			else if (!stricmp(mode, "v0-2"))
				import->asemode = GF_IMPORT_AUDIO_SAMPLE_ENTRY_v0_2;
			else if (!stricmp(mode, "v1"))
				import->asemode = GF_IMPORT_AUDIO_SAMPLE_ENTRY_v1_MPEG;
			else if (!stricmp(mode, "v1-qt"))
				import->asemode = GF_IMPORT_AUDIO_SAMPLE_ENTRY_v1_QTFF;
			else
				M4_LOG(GF_LOG_ERROR, ("Unrecognized audio sample entry mode %s, ignoring\n", mode));
		}
		else if (!strnicmp(ext+1, "audio_roll=", 11)) { roll_change = 3; roll = parse_s32(ext+12, "audio_roll"); }
		else if (!strnicmp(ext+1, "roll=", 5)) { roll_change = 1; roll = parse_s32(ext+6, "roll"); }
		else if (!strnicmp(ext+1, "proll=", 6)) { roll_change = 2; roll = parse_s32(ext+7, "proll"); }
		else if (!strcmp(ext+1, "stz2")) {
			use_stz2 = GF_TRUE;
		} else if (!strnicmp(ext+1, "bitdepth=", 9)) {
			bitdepth = parse_u32(ext+10, "bitdepth");
		}
		else if (!strnicmp(ext+1, "hdr=", 4)) {
			hdr_file = gf_strdup(ext+5);
		}
		else if (!strnicmp(ext+1, "colr=", 5)) {
			char *cval = ext+6;
			if (!strcmp(cval, "none")) {
				clr_type = (u32) -1;
			} else if (strlen(cval)<6) {
				fmt_ok = GF_FALSE;
			} else {
				clr_type = GF_4CC(cval[0],cval[1],cval[2],cval[3]);
				cval+=4;
				if (cval[0] != ',') {
					fmt_ok = GF_FALSE;
				}
				else if ((clr_type==GF_ISOM_SUBTYPE_NCLX) || (clr_type==GF_ISOM_SUBTYPE_NCLC)) {
					fmt_ok = scan_color(cval+1, &clr_prim, &clr_tranf, &clr_mx, &clr_full_range);
				}
				else if ((clr_type==GF_ISOM_SUBTYPE_RICC) || (clr_type==GF_ISOM_SUBTYPE_PROF)) {
					FILE *f = gf_fopen(cval+1, "rb");
					if (!f) {
						M4_LOG(GF_LOG_ERROR, ("Failed to open file %s\n", cval+1));
						e = GF_BAD_PARAM;
						goto exit;
					} else {
						gf_fseek(f, 0, SEEK_END);
						icc_size = (u32) gf_ftell(f);
						icc_data = gf_malloc(sizeof(char)*icc_size);
						gf_fseek(f, 0, SEEK_SET);
						icc_size = (u32) gf_fread(icc_data, icc_size, f);
						gf_fclose(f);
					}
				} else {
					M4_LOG(GF_LOG_ERROR, ("Unrecognized colr profile %s\n", gf_4cc_to_str(clr_type) ));
					e = GF_BAD_PARAM;
					goto exit;
				}
			}
			if (!fmt_ok) {
				e = GF_BAD_PARAM;
				GOTO_EXIT("parsing colr option");
			}
		}
		else if (!strnicmp(ext + 1, "dvp=", 4)) {
			strncpy(dv_profile, ext + 5, 99);
			dv_profile[99]=0;
		}
		//old name
		else if (!strnicmp(ext + 1, "dv-profile=", 11)) {
			M4_LOG(GF_LOG_WARNING, ("Deprecated option name, use `:dvp=` instead\n"));
			strncpy(dv_profile, ext + 12, 99);
			dv_profile[99]=0;
		}
		else if (!strnicmp(ext+1, "fullrange=", 10)) {
			if (!stricmp(ext+11, "off") || !stricmp(ext+11, "no")) fullrange = 0;
			else if (!stricmp(ext+11, "on") || !stricmp(ext+11, "yes")) fullrange = 1;
			else {
				e = GF_BAD_PARAM;
				GOTO_EXIT("invalid format for fullrange")
			}
		}
		else if (!strnicmp(ext+1, "videofmt=", 9)) {
			u32 idx, count = GF_ARRAY_LENGTH(videofmt_names);
			for (idx=0; idx<count; idx++) {
				if (!strcmp(ext+10, videofmt_names[idx])) {
					videofmt = idx;
					break;
				}
			}
			if (videofmt==-1) {
				e = GF_BAD_PARAM;
				GOTO_EXIT("invalid format for videofmt")
			}
		}
		else if (!strnicmp(ext+1, "colorprim=", 10)) {
			colorprim = gf_cicp_parse_color_primaries(ext+11);
			if (colorprim==-1) {
				e = GF_BAD_PARAM;
				GOTO_EXIT("invalid format for colorprim")
			}
		}
		else if (!strnicmp(ext+1, "colortfc=", 9)) {
			colortfc = gf_cicp_parse_color_transfer(ext+10);
			if (colortfc==-1) {
				e = GF_BAD_PARAM;
				GOTO_EXIT("invalid format for colortfc")
			}
		}
		else if (!strnicmp(ext+1, "colormx=", 8)) {
			colormx = gf_cicp_parse_color_matrix(ext+9);
			if (colormx==-1) {
				e = GF_BAD_PARAM;
				GOTO_EXIT("invalid format for colormx")
			}
		}
		else if (!strnicmp(ext+1, "tc=", 3)) {
			char *tc_str = ext+4;

			if (tc_str[0] == 'd') {
				tc_drop_frame=GF_TRUE;
				tc_str+=1;
			}
			if (sscanf(tc_str, "%d/%d,%d,%d,%d,%d,%d", &tc_fps_num, &tc_fps_den, &tc_h, &tc_m, &tc_s, &tc_f, &tc_frames_per_tick) == 7) {
			} else if (sscanf(tc_str, "%d/%d,%d,%d,%d,%d", &tc_fps_num, &tc_fps_den, &tc_h, &tc_m, &tc_s, &tc_f) == 6) {
			} else if (sscanf(tc_str, "%d,%d,%d,%d,%d,%d", &tc_fps_num, &tc_h, &tc_m, &tc_s, &tc_f, &tc_frames_per_tick) == 6) {
				tc_fps_den = 1;
			} else if (sscanf(tc_str, "%d,%d,%d,%d,%d", &tc_fps_num, &tc_h, &tc_m, &tc_s, &tc_f) == 5) {
				tc_fps_den = 1;
			} else if (sscanf(tc_str, "%d/%d,%d,%d", &tc_fps_num, &tc_fps_den, &tc_f, &tc_frames_per_tick) == 4) {
				tc_force_counter = GF_TRUE;
				tc_h = tc_m = tc_s = 0;
			} else if (sscanf(tc_str, "%d/%d,%d", &tc_fps_num, &tc_fps_den, &tc_f) == 3) {
				tc_force_counter = GF_TRUE;
				tc_h = tc_m = tc_s = 0;
			} else if (sscanf(tc_str, "%d,%d,%d", &tc_fps_num, &tc_f, &tc_frames_per_tick) == 3) {
				tc_force_counter = GF_TRUE;
				tc_h = tc_m = tc_s = 0;
				tc_fps_den = 1;
			} else if (sscanf(tc_str, "%d,%d", &tc_fps_num, &tc_f) == 2) {
				tc_force_counter = GF_TRUE;
				tc_h = tc_m = tc_s = 0;
				tc_fps_den = 1;
			} else {
				M4_LOG(GF_LOG_ERROR, ("Bad format %s for timecode, ignoring\n", ext+1));
			}
		}
		else if (!strnicmp(ext+1, "edits=", 6)) {
			edits = gf_strdup(ext+7);
		}
		else if (!strnicmp(ext+1, "lastsampdur", 11)) {
			has_last_sample_dur = GF_TRUE;
			if (!strnicmp(ext+1, "lastsampdur=", 12)) {
				if (sscanf(ext+13, "%d/%u", &last_sample_dur.num, &last_sample_dur.den)==2) {
				} else {
					last_sample_dur.num = parse_s32(ext+13, "lastsampdur");
					last_sample_dur.den = 1000;
				}
			}
		}
		else if (!strnicmp(ext+1, "ID=", 3)) {
			import->target_trackID = (u32) parse_u32(ext+4, "ID");
		}
		else if (!strnicmp(ext+1, "tkgp=", 5)) {
			e = GF_BAD_PARAM;
			char *sep=strchr(ext+1, ',');
			if (!sep) {
				GOTO_EXIT("invalid format for tkgp")
			}
			sep[0] = 0;
			tkgp_id = atoi(sep+1);
			if (strlen(ext+6)==4) tkgp_type=GF_4CC(ext[6], ext[7], ext[8], ext[9]);
			sep[0] = ',';
			if (!tkgp_type) {
				GOTO_EXIT("invalid format for tkgp")
			}
			e = GF_OK;
			if (tkgp_id<0) {
				tkgp_id = -tkgp_id;
				tkgp_add = GF_FALSE;
			}
		}
		else if (!strnicmp(ext+1, "tkidx=", 6)) {
			set_tk_idx = atoi(ext+7);
		}
		/*unrecognized, assume name has colon in it*/
		else {
			M4_LOG(GF_LOG_ERROR, ("Unrecognized import option %s, ignoring\n", ext+1));
			if (ext2) ext2[0] = ':';
			ext = ext2;
			continue;
		}
		if (src_is_isom) {
			char *opt = ext+1;
			char *sep_eq = strchr(opt, '=');
			if (sep_eq) sep_eq[0] = 0;
			if (!mp4box_check_isom_fileopt(opt)) {
				M4_LOG(GF_LOG_ERROR, ("\t! Import option `%s` not available for ISOBMFF/QT sources, ignoring !\n", ext+1));
			}
			if ((!has_non_extk_opt || (is_extk==2)) && mp4box_check_non_extk_fileopt(opt)) {
				has_non_extk_opt = GF_TRUE;
				if (is_extk==2) {
					M4_LOG(GF_LOG_ERROR, ("\t! Import option `%s` not allowed for external ISOBMFF tracks !\n", ext+1));
					e = GF_BAD_PARAM;
					GOTO_EXIT(NULL)
				}
			}
			if (sep_eq) sep_eq[0] = '=';
		}

		if (ext2) ext2[0] = ':';

		if (!first_ext) {
			first_ext = ext;
			ext[0] = 0;
		}

		/* restart from where we stopped
		 * if we didn't stop (ext2 null) then the end has been reached
		 * so we can stop the whole thing */
		ext = ext2;
	}

	/*check duration import (old syntax)*/
	ext = strrchr(final_name, '%');
	if (ext && gf_sys_old_arch_compat()) {
		if (gf_parse_frac(ext+1, &import->duration))
			ext[0] = 0;
		else
			ext = NULL;
	}

	/*select switches for av containers import*/
	do_audio = do_video = do_auxv = do_pict = 0;
	track_id = prog_id = 0;
	do_all = 1;

	ext_start = gf_file_ext_start(final_name);
	ext = strrchr(ext_start ? ext_start : final_name, '#');
	if (ext) ext[0] = 0;

	if (fake_import && ext) {
		ext++;
		if (!strnicmp(ext, "audio", 5)) do_audio = 1;
		else if (!strnicmp(ext, "video", 5)) do_video = 1;
		else if (!strnicmp(ext, "auxv", 4)) do_auxv = 1;
		else if (!strnicmp(ext, "pict", 4)) do_pict = 1;
		else if (!strnicmp(ext, "trackID=", 8)) track_id = parse_u32(&ext[8], "trackID");
		else track_id = parse_u32(ext, "ID");
	}
	else if (ext) {
		ext++;
		char *sep = gf_url_colon_suffix(ext, '=');
		if (sep) sep[0] = 0;

		//we have a fragment, we need to check if the track or the program is present in source
		import->in_name = final_name;
		import->flags = GF_IMPORT_PROBE_ONLY;
		e = gf_media_import(import);
		GOTO_EXIT("importing import");

		if (!strnicmp(ext, "audio", 5)) do_audio = 1;
		else if (!strnicmp(ext, "video", 5)) do_video = 1;
        else if (!strnicmp(ext, "auxv", 4)) do_auxv = 1;
        else if (!strnicmp(ext, "pict", 4)) do_pict = 1;
		else if (!strnicmp(ext, "trackID=", 8)) track_id = parse_u32(&ext[8], "trackID");
		else if (!strnicmp(ext, "PID=", 4)) track_id = parse_u32(&ext[4], "ID");
		else if (!strnicmp(ext, "program=", 8)) {
			for (i=0; i<import->nb_progs; i++) {
				if (!stricmp(import->pg_info[i].name, ext+8)) {
					prog_id = import->pg_info[i].number;
					do_all = 0;
					break;
				}
			}
		}
		else if (!strnicmp(ext, "prog_id=", 8)) {
			prog_id = parse_u32(ext+8, "prog_id");
			do_all = 0;
		}
		else track_id = parse_u32(ext, "ID");

		//figure out trackID
		if (do_audio || do_video || do_auxv || do_pict || track_id) {
			Bool found = track_id ? GF_FALSE : GF_TRUE;
			for (i=0; i<import->nb_tracks; i++) {
				if (track_id && (import->tk_info[i].track_num==track_id)) {
					found=GF_TRUE;
					break;
				}
				if (do_audio && (import->tk_info[i].stream_type==GF_STREAM_AUDIO)) {
					track_id = import->tk_info[i].track_num;
					break;
				}
				else if (do_video && (import->tk_info[i].stream_type==GF_STREAM_VISUAL)) {
					track_id = import->tk_info[i].track_num;
					break;
				}
				else if (do_auxv && (import->tk_info[i].media_subtype==GF_ISOM_MEDIA_AUXV)) {
					track_id = import->tk_info[i].track_num;
					break;
				}
				else if (do_pict && (import->tk_info[i].media_subtype==GF_ISOM_MEDIA_PICT)) {
					track_id = import->tk_info[i].track_num;
					break;
				}
			}
			if (!track_id || !found) {
				M4_LOG(GF_LOG_ERROR, ("Cannot find track ID matching fragment #%s\n", ext));
				if (sep) sep[0] = ':';
				e = GF_NOT_FOUND;
				goto exit;
			}
		}
		if (sep) sep[0] = ':';
	}
	if (do_audio || do_video || do_auxv || do_pict || track_id) do_all = 0;

	if (track_layout || is_chap) {
		u32 w, h, sw, sh, fw, fh;
		w = h = sw = sh = fw = fh = 0;
		chap_ref = 0;
		for (i=0; i<gf_isom_get_track_count(dest); i++) {
			switch (gf_isom_get_media_type(dest, i+1)) {
			case GF_ISOM_MEDIA_SCENE:
			case GF_ISOM_MEDIA_VISUAL:
            case GF_ISOM_MEDIA_AUXV:
            case GF_ISOM_MEDIA_PICT:
				if (!chap_ref && gf_isom_is_track_enabled(dest, i+1) ) chap_ref = i+1;

				gf_isom_get_visual_info(dest, i+1, 1, &sw, &sh);
				gf_isom_get_track_layout_info(dest, i+1, &fw, &fh, NULL, NULL, NULL);
				if (w<sw) w = sw;
				if (w<fw) w = fw;
				if (h<sh) h = sh;
				if (h<fh) h = fh;
				break;
			case GF_ISOM_MEDIA_AUDIO:
				if (!chap_ref && gf_isom_is_track_enabled(dest, i+1) ) chap_ref = i+1;
				break;
			}
		}
		if (track_layout) {
			if (!tw) tw = w;
			if (!th) th = h;
			if (ty==-1) ty = (h>(u32)th) ? h-th : 0;
			import->text_width = tw;
			import->text_height = th;
		}
		if (is_chap && chap_ref) import_flags |= GF_IMPORT_NO_TEXT_FLUSH;
	}
	if (text_layout && txtw && txth) {
		import->text_track_width = import->text_width ? import->text_width : txtw;
		import->text_track_height = import->text_height ? import->text_height : txth;
		import->text_width = txtw;
		import->text_height = txth;
		import->text_x = txtx;
		import->text_y = txty;
	}

	check_track_for_svc = check_track_for_lhvc = check_track_for_hevc = 0;

	source_magic = (u64) gf_crc_32((u8 *)inName, (u32) strlen(inName));

	if (is_extk) {
		u32 ext_tk=0;
		GF_ISOFile *isom_in = gf_isom_open(final_name, GF_ISOM_OPEN_READ, NULL);
		if (!isom_in) {
			e = gf_isom_last_error(NULL);
			GOTO_EXIT("opening source")
		}
		if (!track_id) {
			if (gf_isom_get_track_count(isom_in)>1) {
				gf_isom_delete(isom_in);
				e = GF_BAD_PARAM;
				M4_LOG(GF_LOG_ERROR, ("More than one track in source and no trackID specified\n"));
				GOTO_EXIT("adding track");
			}
			ext_tk = 1;
		} else {
			ext_tk = gf_isom_get_track_by_id(isom_in, track_id);
			if (!ext_tk) {
				gf_isom_delete(isom_in);
				e = GF_BAD_PARAM;
				M4_LOG(GF_LOG_ERROR, ("No track with ID %u in source %s\n", track_id, final_name));
				GOTO_EXIT("adding track");
			}
		}
		if (has_non_extk_opt) {
			is_extk=2;
			if (first_ext) first_ext[0] = ':';

			goto reparse_opts;
		}
		u32 new_tk = 0;
		Bool src_is_extk = gf_isom_is_external_track(isom_in, ext_tk, NULL, NULL, NULL, NULL);
		if (src_is_extk) {
			e = gf_isom_clone_track(isom_in, ext_tk, dest, 0, &new_tk);
			GOTO_EXIT("cloning external track");
		} else {
			u32 type = gf_isom_get_media_type(isom_in, ext_tk);
			u32 timescale = gf_isom_get_media_timescale(isom_in, ext_tk);
			new_tk = gf_isom_new_external_track(dest, 0, track_id, type, timescale, final_name);

			u32 mvscale = gf_isom_get_timescale(dest);

			if (new_tk) {
				u32 w, h;
				s32 tx, ty;
				s16 layer;
				if (gf_isom_get_track_layout_info(isom_in, ext_tk, &w, &h, &tx, &ty, &layer)==GF_OK) {
					gf_isom_set_track_layout_info(dest, new_tk, w<<16, h<<16, tx<<16, ty<<16, layer);
				}
				if (import->duration.num>=0) {
					u64 dur;
					if (import->duration.num)
						dur = gf_timestamp_rescale(import->duration.num, import->duration.den, mvscale);
					else
						dur = gf_timestamp_rescale(gf_isom_get_track_duration(isom_in, ext_tk), gf_isom_get_timescale(isom_in), mvscale);
					gf_isom_force_track_duration(dest, new_tk, dur);
				}
			}
		}
		track_id = gf_isom_get_track_id(dest, new_tk);
		fake_import = 1;
		gf_isom_delete(isom_in);
	} else if (!fake_import && (!fsess || mux_args_if_first_pass)) {
		import->in_name = final_name;
		import->dest = dest;
		import->video_fps = force_fps;
		import->frames_per_sample = frames_per_sample;
		import->flags = import_flags;
		import->keep_audelim = keep_audelim;
		import->print_stats_graph = print_stats_graph;
		import->xps_inband = xps_inband;
		import->prog_id = prog_id;
		import->trackID = track_id;
		import->source_magic = source_magic;
		import->track_index = tk_idx;

		//if moov timescale is <0 (auto mode) set it at import time
		if (moov_timescale<0) {
			import->moov_timescale = moov_timescale;
		}
		//otherwise force it now
		else if (moov_timescale>0) {
			e = gf_isom_set_timescale(dest, moov_timescale);
			GOTO_EXIT("changing timescale")
		}

		import->run_in_session = fsess;
		import->update_mux_args = NULL;
		if (do_all)
			import->flags |= GF_IMPORT_KEEP_REFS;

		e = gf_media_import(import);
		if (e) {
			if (import->update_mux_args) gf_free(import->update_mux_args);
			GOTO_EXIT("importing media");
		}

		if (fsess) {
			*mux_args_if_first_pass = import->update_mux_args;
			import->update_mux_args = NULL;
			*mux_sid_if_first_pass = import->update_mux_sid;
			import->update_mux_sid = NULL;
			goto exit;
		}
	}

	nb_tracks = gf_isom_get_track_count(dest);
	for (i=0; i<nb_tracks; i++) {
		u32 media_type;
		track = i+1;
		media_type = gf_isom_get_media_type(dest, track);
		e = GF_OK;
		if (!fake_import) {
			u64 tk_source_magic;
			tk_source_magic = gf_isom_get_track_magic(dest, track);

			if ((tk_source_magic & 0xFFFFFFFFUL) != source_magic)
				continue;
			tk_source_magic>>=32;
			keep_handler = (tk_source_magic & 1) ? GF_TRUE : GF_FALSE;
		} else {
			keep_handler = GF_TRUE;

			if (do_audio && (media_type!=GF_ISOM_MEDIA_AUDIO)) continue;
			if (do_video && (media_type!=GF_ISOM_MEDIA_VISUAL)) continue;
			if (do_auxv && (media_type!=GF_ISOM_MEDIA_AUXV)) continue;
			if (do_pict && (media_type!=GF_ISOM_MEDIA_PICT)) continue;
			if (track_id && (gf_isom_get_track_id(dest, track) != track_id))
				continue;
		}

		timescale = gf_isom_get_timescale(dest);
		if (szLan) {
			e = gf_isom_set_media_language(dest, track, (char *) szLan);
			GOTO_EXIT("changing language")
		}
		if (do_disable) {
			e = gf_isom_set_track_enabled(dest, track, (do_disable==2) ? GF_TRUE : GF_FALSE);
			GOTO_EXIT("disabling track")
		}
		if (track_flags_mode) {
			e = gf_isom_set_track_flags(dest, track, track_flags, track_flags_mode);
			GOTO_EXIT("disabling track")
		}

		if (import_flags & GF_IMPORT_NO_EDIT_LIST) {
			e = gf_isom_remove_edits(dest, track);
			GOTO_EXIT("removing edits")
		}
		if (delay.num && delay.den) {
			u64 tk_dur;
			e = gf_isom_remove_edits(dest, track);
			tk_dur = gf_isom_get_track_duration(dest, track);
			if (delay.num>0) {
				//cast to s64, timescale*delay could be quite large before /1000
				e |= gf_isom_append_edit(dest, track, ((s64) delay.num) * timescale / delay.den, 0, GF_ISOM_EDIT_EMPTY);
				e |= gf_isom_append_edit(dest, track, tk_dur, 0, GF_ISOM_EDIT_NORMAL);
			} else {
					//cast to s64, timescale*delay could be quite large before /1000
				u64 to_skip = ((s64) -delay.num) * timescale / delay.den;
				if (to_skip<tk_dur) {
					//cast to s64, timescale*delay could be quite large before /1000
					u64 media_time = ((s64) -delay.num) * gf_isom_get_media_timescale(dest, track) / delay.den;
					e |= gf_isom_append_edit(dest, track, tk_dur-to_skip, media_time, GF_ISOM_EDIT_NORMAL);
				} else {
					M4_LOG(GF_LOG_ERROR, ("Warning: request negative delay longer than track duration - ignoring\n"));
				}
			}
			GOTO_EXIT("assigning delay")
		}
		if (gf_isom_is_video_handler_type(media_type)) {
			if (((par_n>=0) && (par_d>=0)) || force_par) {
				e = gf_media_change_par(dest, track, par_n, par_d, force_par, rewrite_bs);
				GOTO_EXIT("changing PAR")
			}
			if ((fullrange>=0) || (videofmt>=0) || (colorprim>=0) || (colortfc>=0) || (colormx>=0)) {
				e = gf_media_change_color(dest, i+1, fullrange, videofmt, colorprim, colortfc, colormx);
				GOTO_EXIT("changing color in bitstream")
			}
			if (has_clap) {
				e = gf_isom_set_clean_aperture(dest, track, 1, clap_wn, clap_wd, clap_hn, clap_hd, clap_hon, clap_hod, clap_von, clap_vod);
				GOTO_EXIT("changing clean aperture")
			}
			if (bitdepth) {
				e = gf_isom_set_visual_bit_depth(dest, track, 1, bitdepth);
				GOTO_EXIT("changing bit depth")
			}
			if (clr_type) {
				if (clr_type==(u32)-1)
					clr_type = 0;

				e = gf_isom_set_visual_color_info(dest, track, 1, clr_type, clr_prim, clr_tranf, clr_mx, clr_full_range, icc_data, icc_size);
				GOTO_EXIT("changing color info")
			}
			if (hdr_file) {
				e = apply_high_dynamc_range_xml_desc(dest, track, hdr_file);
				GOTO_EXIT("setting HDR info")
			}
			if (dv_profile[0]) {
				e = set_dv_profile(dest, track, dv_profile);
				GOTO_EXIT("setting DV profile")
			}

			if (set_ccst) {
				e = gf_isom_set_image_sequence_coding_constraints(dest, track, 1, GF_FALSE, GF_FALSE, GF_TRUE, 15);
				GOTO_EXIT("setting image sequence constraints")
			}
		}
		if (has_mx) {
			e = gf_isom_set_track_matrix(dest, track, mx);
			GOTO_EXIT("setting track matrix")
		}
		if (use_stz2) {
			e = gf_isom_use_compact_size(dest, track, GF_TRUE);
			GOTO_EXIT("setting compact size")
		}

		if (gf_isom_get_media_subtype(dest, track, 1) == GF_ISOM_MEDIA_TIMECODE) {
			tmcd_track = track;
		}
		if (rap_only || refs_only) {
			e = gf_media_remove_non_rap(dest, track, refs_only);
			GOTO_EXIT("removing non RAPs")
		}
		if (handler_name) {
			e = gf_isom_set_handler_name(dest, track, handler_name);
			GOTO_EXIT("setting handler name")
		}
		else if (!keep_handler) {
			char szHName[1024];
			const char *fName = gf_url_get_resource_name((const  char *)inName);
			fName = strchr(fName, '.');
			if (fName) fName += 1;
			else fName = "?";

			sprintf(szHName, "%s@GPAC%s", fName, gf_gpac_version());
			e = gf_isom_set_handler_name(dest, track, szHName);
			GOTO_EXIT("setting handler name")
		}
		if (handler) {
			e = gf_isom_set_media_type(dest, track, handler);
			GOTO_EXIT("setting media type")
		}
		if (group) {
			e = gf_isom_set_alternate_group_id(dest, track, group);
			GOTO_EXIT("setting alternate group")
		}
		if (tkgp_type) {
			e = gf_isom_set_track_group(dest, track, tkgp_id, tkgp_type, tkgp_add);
			GOTO_EXIT("setting trackGroup")
		}

		if (track_layout) {
			e = gf_isom_set_track_layout_info(dest, track, tw<<16, th<<16, tx<<16, ty<<16, tz);
			GOTO_EXIT("setting track layout")
		}
		if (stype) {
			e = gf_isom_set_media_subtype(dest, track, 1, stype);
			GOTO_EXIT("setting media subtype")
		}
		if (is_chap && chap_ref) {
			e = set_chapter_track(dest, track, chap_ref);
			GOTO_EXIT("setting chapter track")
		}

		for (j = 0; j < gf_list_count(kinds); j+=2) {
			char *kind_scheme = (char *)gf_list_get(kinds, j);
			char *kind_value = (char *)gf_list_get(kinds, j+1);
			e = gf_isom_add_track_kind(dest, i+1, kind_scheme, kind_value);
			GOTO_EXIT("setting track kind")
		}

		if (profile || compat || level) {
			e = gf_media_change_pl(dest, track, profile, compat, level);
			GOTO_EXIT("changing video PL")
		}
		if (gf_isom_get_mpeg4_subtype(dest, track, 1))
			keep_sys_tracks = 1;

		//if moov timescale is <0 (auto mode) set it at import time
		if (fake_import) {
			if (import_flags & GF_IMPORT_NO_EDIT_LIST)
				gf_isom_remove_edits(dest, track);

			if (moov_timescale<0) {
				moov_timescale = gf_isom_get_media_timescale(dest, track);
			}
			if (moov_timescale>0) {
				e = gf_isom_set_timescale(dest, moov_timescale);
				GOTO_EXIT("changing timescale")
			}

			if (import->asemode && (media_type==GF_ISOM_MEDIA_AUDIO)) {
				u32 sr, ch, bps;
				gf_isom_get_audio_info(dest, track, 1, &sr, &ch, &bps);
				gf_isom_set_audio_info(dest, track, 1, sr, ch, bps, import->asemode);
			}
		}

		if (roll_change) {
			if ((roll_change!=3) || (media_type==GF_ISOM_MEDIA_AUDIO)) {
				e = gf_isom_set_sample_roll_group(dest, track, (u32) -1, (roll_change==2) ? GF_ISOM_SAMPLE_PREROLL : GF_ISOM_SAMPLE_ROLL, roll);
				GOTO_EXIT("assigning roll")
			}
		}

		if (new_timescale>1) {
			e = gf_isom_set_media_timescale(dest, track, new_timescale, 0, 0);
			GOTO_EXIT("setting media timescale")
		}

		if (rescale_num > 1) {
			switch (gf_isom_get_media_type(dest, track)) {
			case GF_ISOM_MEDIA_AUDIO:
				if (!rescale_override) {
					M4_LOG(GF_LOG_WARNING, ("Cannot force media timescale for audio media types - ignoring\n"));
					break;
				}
			default:
				e = gf_isom_set_media_timescale(dest, track, rescale_num, rescale_den, rescale_override ? 2 : 1);
                if (e==GF_EOS) {
					M4_LOG(GF_LOG_WARNING, ("Rescale ignored, same config in source file\n"));
					e = GF_OK;
				}
				GOTO_EXIT("rescaling media track")
				break;
			}
		} else if (src_is_isom && force_fps.den && force_fps.num) {
			if (gf_isom_is_video_handler_type(gf_isom_get_media_type(dest, track))) {
				e = gf_isom_set_media_timescale(dest, track, force_fps.num, force_fps.den, 2);
                if (e==GF_EOS) {
					M4_LOG(GF_LOG_WARNING, ("Rescale ignored, same config in source file\n"));
					e = GF_OK;
				}

			} else {
				M4_LOG(GF_LOG_WARNING, ("Cannot force FPS for media types %s - ignoring\n", gf_4cc_to_str( gf_isom_get_media_type(dest, track)) ));
			}
		}

		if (has_last_sample_dur) {
			e = gf_isom_set_last_sample_duration_ex(dest, track, last_sample_dur.num, last_sample_dur.den);
			GOTO_EXIT("setting last sample duration")
		}
		if (rvc_config) {
#ifdef GPAC_DISABLE_ZLIB
			M4_LOG(GF_LOG_ERROR, ("Error: no zlib support - RVC not available\n"));
			e = GF_NOT_SUPPORTED;
			goto exit;
#else
			u8 *data;
			u32 size;
			e = gf_file_load_data(rvc_config, (u8 **) &data, &size);
			GOTO_EXIT("loading RVC config file")

			gf_gz_compress_payload_ex (&data, size, &size, 0, GF_FALSE, NULL, GF_TRUE);
			e |= gf_isom_set_rvc_config(dest, track, 1, 0, "application/rvc-config+xml+gz", data, size);
			gf_free(data);
			GOTO_EXIT("compressing and assigning RVC config")
#endif
		} else if (rvc_predefined>0) {
			e = gf_isom_set_rvc_config(dest, track, 1, rvc_predefined, NULL, NULL, 0);
			GOTO_EXIT("setting RVC predefined config")
		}

		if (neg_ctts_mode) {
			e = gf_isom_set_composition_offset_mode(dest, track, (neg_ctts_mode==1) ? GF_TRUE : GF_FALSE);
			GOTO_EXIT("setting composition offset mode")
		}

		if (gf_isom_get_avc_svc_type(dest, track, 1)>=GF_ISOM_AVCTYPE_AVC_SVC)
			check_track_for_svc = track;

		switch (gf_isom_get_hevc_lhvc_type(dest, track, 1)) {
		case GF_ISOM_HEVCTYPE_HEVC_LHVC:
		case GF_ISOM_HEVCTYPE_LHVC_ONLY:
			check_track_for_lhvc = i+1;
			break;
		case GF_ISOM_HEVCTYPE_HEVC_ONLY:
			check_track_for_hevc=1;
			break;
		default:
			break;
		}

		if (txt_flags) {
			e = gf_isom_text_set_display_flags(dest, track, 0, txt_flags, txt_mode);
			GOTO_EXIT("setting text track display flags")
		}

		if (edits) {
			e = apply_edits(dest, track, edits);
			GOTO_EXIT("applying edits")
		}

		if (force_rate>=0) {
			e = gf_isom_update_bitrate(dest, i+1, 1, force_rate, force_rate, 0);
			GOTO_EXIT("updating bitrate")
		}

		if (split_tile_mode) {
			switch (gf_isom_get_media_subtype(dest, track, 1)) {
			case GF_ISOM_SUBTYPE_HVC1:
			case GF_ISOM_SUBTYPE_HEV1:
			case GF_ISOM_SUBTYPE_HVC2:
			case GF_ISOM_SUBTYPE_HEV2:
				break;
			default:
				split_tile_mode = 0;
				break;
			}
		}
		if ((dlb_mode>=-1) && (gf_isom_get_media_subtype(dest, track, 1)==GF_ISOM_SUBTYPE_EC3)) {
			GF_AC3Config *ac3c = gf_isom_ac3_config_get(dest, track, 1);
			if (ac3c) {
				if (dlb_mode==0) {
					ac3c->is_ec3 = GF_TRUE;
					ac3c->atmos_ec3_ext=0;
					ac3c->complexity_index_type=0;
				} else {
#ifndef GPAC_DISABLE_AV_PARSERS
					u32 di;
					GF_ISOSample *samp = gf_isom_get_sample(dest, track, 1, &di);
					u32 pos;
					gf_eac3_parser(samp->data, samp->dataLength, &pos, ac3c, GF_TRUE);

					if (dlb_mode>0) {
						ac3c->atmos_ec3_ext = 1;
						ac3c->complexity_index_type = dlb_mode;
					}
#endif
				}
				gf_isom_ac3_config_update(dest, track, 1, ac3c);
				gf_free(ac3c);
			}
		}

		//if track order is required, gather track IDs - we cannot change directly track order since this impacts track number
		//and would break this loop
		if (set_tk_idx) {
			reorder_tk_ids = gf_realloc(reorder_tk_ids, sizeof(u32)*(reorder_tk_ids_count+1));
			reorder_tk_ids[reorder_tk_ids_count] = gf_isom_get_track_id(dest, track);
			reorder_tk_ids_count++;
		}

		if (timestamp_source) {
			if (!track_id && gf_isom_get_track_count(dest)==1)
				track_id = gf_isom_get_track_id(dest, 1);

			if (!track_id) {
				GF_LOG(GF_LOG_WARNING, GF_LOG_CONTAINER, ("Warning: `times=`cannot be used with multi-track import, ignoring\n"));
			} else {
				apply_timestamps(dest, track_id, timestamp_source);
			}
		}
	}

	if (reorder_tk_ids_count) {
		for (i=0; i<reorder_tk_ids_count; i++) {
			u32 tk = gf_isom_get_track_by_id(dest, reorder_tk_ids[i]);
			gf_isom_set_track_index(dest, tk, set_tk_idx, NULL, NULL);
			set_tk_idx++;
		}
	}

	if (chapter_name) {
		if (is_chap_file) {
			GF_Fraction a_fps = {0,0};
			e = gf_media_import_chapters(dest, chapter_name, a_fps, GF_FALSE);
		} else {
			e = gf_isom_add_chapter(dest, 0, 0, chapter_name);
		}
		GOTO_EXIT("importing chapters")
	}

	if (tmcd_track) {
		u32 tmcd_id = gf_isom_get_track_id(dest, tmcd_track);
		for (i=0; i < gf_isom_get_track_count(dest); i++) {
			switch (gf_isom_get_media_type(dest, i+1)) {
			case GF_ISOM_MEDIA_VISUAL:
			case GF_ISOM_MEDIA_AUXV:
			case GF_ISOM_MEDIA_PICT:
				break;
			default:
				continue;
			}
			e = gf_isom_set_track_reference(dest, i+1, GF_ISOM_REF_TMCD, tmcd_id);
			GOTO_EXIT("assigning TMCD track references")
		}
	}

	/*force to rewrite all dependencies*/
	for (i = 1; i <= gf_isom_get_track_count(dest); i++)
	{
		e = gf_isom_rewrite_track_dependencies(dest, i);
		if (e) {
			GF_LOG(GF_LOG_WARNING, GF_LOG_CONTAINER, ("Warning: track ID %d has references to a track not imported\n", gf_isom_get_track_id(dest, i) ));
			e = GF_OK;
		}
	}

#ifndef GPAC_DISABLE_AV_PARSERS
	if (max_layer_id_plus_one || max_temporal_id_plus_one) {
		for (i = 1; i <= gf_isom_get_track_count(dest); i++)
		{
			e = gf_media_filter_hevc(dest, i, max_temporal_id_plus_one, max_layer_id_plus_one);
			if (e) {
				M4_LOG(GF_LOG_ERROR, ("Warning: track ID %d: error while filtering LHVC layers\n", gf_isom_get_track_id(dest, i)));
				e = GF_OK;
			}
		}
	}
#endif

	if (check_track_for_svc) {
		if (svc_mode) {
			e = gf_media_split_svc(dest, check_track_for_svc, (svc_mode==2) ? 1 : 0);
			GOTO_EXIT("splitting SVC track")
		} else {
			e = gf_media_merge_svc(dest, check_track_for_svc, 1);
			GOTO_EXIT("merging SVC/SHVC track")
		}
	}
#ifndef GPAC_DISABLE_AV_PARSERS
	if (check_track_for_lhvc) {
		if (svc_mode) {
			GF_LHVCExtractoreMode xmode = GF_LHVC_EXTRACTORS_ON;
			if (svc_mode==3) xmode = GF_LHVC_EXTRACTORS_OFF;
			else if (svc_mode==4) xmode = GF_LHVC_EXTRACTORS_OFF_FORCE_INBAND;
			e = gf_media_split_lhvc(dest, check_track_for_lhvc, GF_FALSE, (svc_mode==1) ? 0 : 1, xmode );
			GOTO_EXIT("splitting L-HEVC track")
		} else {
			//TODO - merge, temporal sublayers
		}
	}
	if (check_track_for_hevc) {
		if (split_tile_mode) {
			e = gf_media_split_hevc_tiles(dest, split_tile_mode - 1);
			GOTO_EXIT("splitting HEVC tiles")
		}
		if (temporal_mode) {
			GF_LHVCExtractoreMode xmode = (temporal_mode==3) ? GF_LHVC_EXTRACTORS_OFF : GF_LHVC_EXTRACTORS_ON;
			e = gf_media_split_lhvc(dest, check_track_for_hevc, GF_TRUE, (temporal_mode==1) ? GF_FALSE : GF_TRUE, xmode );
			GOTO_EXIT("splitting HEVC temporal sublayers")
		}
	}

	if (tc_fps_num) {
		u32 desc_index=0;
		u32 tmcd_tk, tmcd_id;
		u32 video_ref = 0;
		GF_BitStream *bs;
		GF_ISOSample *samp;
		for (i=0; i<gf_isom_get_track_count(dest); i++) {
			if (gf_isom_is_video_handler_type(gf_isom_get_media_type(dest, i+1))) {
				video_ref = i+1;
				break;
			}
		}
		tmcd_tk = gf_isom_new_track(dest, 0, GF_ISOM_MEDIA_TIMECODE, tc_fps_num);
		if (!tmcd_tk) {
			e = gf_isom_last_error(dest);
			GOTO_EXIT("creating TMCD track")
		}
		e = gf_isom_set_track_enabled(dest, tmcd_tk, 1);
		if (e != GF_OK) {
			GOTO_EXIT("enabling TMCD track")
		}

		if (!tc_frames_per_tick) {
			tc_frames_per_tick = tc_fps_num;
			tc_frames_per_tick /= tc_fps_den;
			if (tc_frames_per_tick * tc_fps_den < tc_fps_num)
				tc_frames_per_tick++;
		}

		u32 tmcd_value = (tc_h * 3600 + tc_m*60 + tc_s)*tc_frames_per_tick+tc_f;
		tmcd_id = gf_isom_get_track_id(dest, tmcd_tk);

		e = gf_isom_tmcd_config_new(dest, tmcd_tk, tc_fps_num, tc_fps_den, tc_frames_per_tick, tc_drop_frame, tc_force_counter, &desc_index);
		GOTO_EXIT("configuring TMCD sample description")

		if (video_ref) {
			e = gf_isom_set_track_reference(dest, video_ref, GF_ISOM_REF_TMCD, tmcd_id);
			GOTO_EXIT("assigning TMCD track ref on video track")
		}
		bs = gf_bs_new(NULL, 0, GF_BITSTREAM_WRITE);
		gf_bs_write_u32(bs, tmcd_value);
		samp = gf_isom_sample_new();
		samp->IsRAP = SAP_TYPE_1;
		gf_bs_get_content(bs, &samp->data, &samp->dataLength);
		gf_bs_del(bs);
		e = gf_isom_add_sample(dest, tmcd_tk, desc_index, samp);
		gf_isom_sample_del(&samp);
		GOTO_EXIT("assigning TMCD sample")

		if (video_ref) {
			u64 video_ref_dur = gf_isom_get_media_duration(dest, video_ref);
			video_ref_dur *= tc_fps_num;
			video_ref_dur /= gf_isom_get_media_timescale(dest, video_ref);
			e = gf_isom_set_last_sample_duration(dest, tmcd_tk, (u32) video_ref_dur);
		} else {
			e = gf_isom_set_last_sample_duration(dest, tmcd_tk, tc_fps_den ? tc_fps_den : 1);
		}
		GOTO_EXIT("setting TMCD sample dur")
	}

#endif /*GPAC_DISABLE_AV_PARSERS*/

exit:
	while (gf_list_count(kinds)) {
		char *kind = (char *)gf_list_get(kinds, 0);
		gf_list_rem(kinds, 0);
		if (kind) gf_free(kind);
	}
	if (opt_src) opt_src[0] = ':';
	if (opt_dst) opt_dst[0] = ':';
	if (fchain) fchain[0] = ':';
	if (hdr_file) gf_free(hdr_file);

	gf_list_del(kinds);
	if (handler_name) gf_free(handler_name);
	if (chapter_name ) gf_free(chapter_name);
	if (import->fontName) gf_free(import->fontName);
	if (import->streamFormat) gf_free(import->streamFormat);
	if (import->force_ext) gf_free(import->force_ext);
	if (rvc_config) gf_free(rvc_config);
	if (edits) gf_free(edits);
	if (szLan) gf_free((char *)szLan);
	if (icc_data) gf_free(icc_data);
	if (final_name) gf_free(final_name);
	if (reorder_tk_ids) gf_free(reorder_tk_ids);
	if (import) gf_free(import);
	if (timestamp_source) gf_free(timestamp_source);

	if (!e) return GF_OK;
	if (fail_msg) {
		M4_LOG(GF_LOG_ERROR, ("Failure while %s: %s\n", fail_msg, gf_error_to_string(e) ));
	}
	return e;
}

typedef struct
{
	Double progress;
	u32 file_idx;
} SplitInfo;

static Bool on_split_event(void *_udta, GF_Event *evt)
{
	Double progress;
	SplitInfo *sinfo = (SplitInfo *)_udta;
	if (!_udta) return GF_FALSE;
	if (evt->type != GF_EVENT_PROGRESS) return GF_FALSE;
	if (!evt->progress.total) return GF_FALSE;

	progress = (Double) (100*evt->progress.done) / evt->progress.total;
	if (progress <= sinfo->progress)
		return GF_FALSE;

	if (evt->progress.done == evt->progress.total) {
		if (sinfo->progress <= 0)
			return GF_FALSE;
#ifndef GPAC_DISABLE_LOG
		GF_LOG(GF_LOG_INFO, GF_LOG_APP, ("splitting: file %d done\n", sinfo->file_idx));
#else
		fprintf(stderr, "splitting: file %d done\n", sinfo->file_idx);
#endif
		sinfo->file_idx++;
		sinfo->progress = -1;
	} else {
		sinfo->progress = progress;
#ifndef GPAC_DISABLE_LOG
		GF_LOG(GF_LOG_INFO, GF_LOG_APP, ("splitting: % 2.2f %%\r", progress));
#else
		fprintf(stderr, "splitting: % 2.2f %%\r", progress);
#endif
	}
	return GF_FALSE;
}

extern u32 do_flat;
extern Bool do_frag, use_mfra;
extern Double interleaving_time;

GF_Err split_isomedia_file(GF_ISOFile *mp4, Double split_dur, u64 split_size_kb, char *inName, Double InterleavingTime, Double chunk_start_time, u32 adjust_split_end, char *outName, Bool force_rap_split, const char *split_range_str, u32 fs_dump_flags)
{
	Bool chunk_extraction, rap_split, split_until_end, use_splitrange=GF_TRUE;
	GF_Err e;
	char *ext, szName[GF_MAX_PATH], szFile[GF_MAX_PATH+100], szArgs[1000];
	Double chunk_start = (Double) chunk_start_time;
	char *filter_args = NULL;
	GF_FilterSession *fs;
	GF_Filter *src, *reframe, *dst;
	SplitInfo sinfo;

	sinfo.progress = -1;
	sinfo.file_idx = 1;

	chunk_extraction = (chunk_start>=0) ? GF_TRUE : GF_FALSE;
	if (split_range_str)
		chunk_extraction = GF_TRUE;
	split_until_end = GF_FALSE;
	rap_split = GF_FALSE;
	if (split_size_kb == (u64)-1) rap_split = GF_TRUE;
	if (split_dur == -1) rap_split = GF_TRUE;
	else if (split_dur <= -2) {
		split_size_kb = 0;
		split_until_end = GF_TRUE;
	}
	else if (force_rap_split)
		rap_split = GF_TRUE;

	//split in same dir as source
	strcpy(szName, inName);
	ext = strrchr(szName, '.');
	if (ext) ext[0] = 0;

	fs = gf_fs_new_defaults(0);
	if (!fs) {
		M4_LOG(GF_LOG_ERROR, ("Failed to load filter session, aborting\n"));
		return GF_IO_ERR;
	}

	//load source with all tracks processing
	sprintf(szArgs, "mp4dmx:mov=%p:alltk", mp4);
	src = gf_fs_load_filter(fs, szArgs, &e);

	if (!src) {
		M4_LOG(GF_LOG_ERROR, ("Failed to load source filter: %s\n", gf_error_to_string(e) ));
		gf_fs_del(fs);
		return e;
	}
	//default output name formatting
	if (!outName) {
		strcpy(szFile, szName);
		strcat(szFile, "_$num%03d$");
	}

	gf_dynstrcat(&filter_args, "reframer", NULL);

	if (rap_split) {
		gf_dynstrcat(&filter_args, ":xs=SAP", NULL);
	} else if (split_size_kb) {
		sprintf(szArgs, ":xs=S"LLU"k", split_size_kb);
		gf_dynstrcat(&filter_args, szArgs, NULL);
	} else if (chunk_extraction) {
		//we adjust end: start at the iframe at or after requested time and use xadjust (move end to next I-frame)
		//so that two calls with X:Y and Y:Z have the same Y boundary
		if (adjust_split_end==1) {
			gf_dynstrcat(&filter_args, ":xadjust:xround=after", NULL);
		} else if (adjust_split_end==2) {
			gf_dynstrcat(&filter_args, ":xadjust:xround=before", NULL);
		} else if (adjust_split_end==3) {
			gf_dynstrcat(&filter_args, ":xround=seek", NULL);
		} else if (!gf_sys_find_global_arg("xround")) {
			gf_dynstrcat(&filter_args, ":xround=closest", NULL);
		}
		if (!adjust_split_end || (adjust_split_end==3)) {
			if (!gf_sys_find_global_arg("probe_ref")) {
				gf_dynstrcat(&filter_args, ":probe_ref", NULL);
			}
		}

		if (split_range_str) {
			Bool first = GF_TRUE;
			char *xs_a=NULL, *xe_a=NULL;
			gf_dynstrcat(&xs_a, ":xs=", NULL);
			gf_dynstrcat(&xe_a, ":xe=", NULL);
			while (1) {
				char c;
				char *next_t = strchr(split_range_str, ',');
				if (next_t) next_t[0] = 0;
				Bool is_time = GF_FALSE;

				//S-E syntax
				char *end = (char *) strchr(split_range_str, '-');
				if (!end) {
					//S:E syntax
					end = (char *) strchr(split_range_str, ':');
					//if another `:` assume time format
					if (end && strchr(end+1, ':'))
						is_time = GF_TRUE;
				} else if (strchr(split_range_str, ':')) {
					is_time = GF_TRUE;
				}
				if (!end) {
					gf_free(filter_args);
					M4_LOG(GF_LOG_ERROR, ("Invalid range specifer %s, expecting START-END or START:END\n", split_range_str ));
					gf_fs_del(fs);
					if (next_t) next_t[0] = ',';
					return GF_BAD_PARAM;
				}

				if (!first) {
					gf_dynstrcat(&xs_a, ",", NULL);
					gf_dynstrcat(&xe_a, ",", NULL);
				}
				first = GF_FALSE;
				c = end[0];
				end[0] = 0;
				if (is_time) {
					gf_dynstrcat(&xs_a, "T", NULL);
					gf_dynstrcat(&xe_a, "T", NULL);
				}
				gf_dynstrcat(&xs_a, split_range_str, NULL);
				gf_dynstrcat(&xe_a, end+1, NULL);
				end[0] = c;
				if (!next_t) break;
				next_t[0] = ',';
				split_range_str = next_t + 1;
			}
			if (xs_a) {
				gf_dynstrcat(&filter_args, xs_a, NULL);
				gf_free(xs_a);
			}
			if (xe_a) {
				gf_dynstrcat(&filter_args, xe_a, NULL);
				gf_free(xe_a);
			}
			szArgs[0]=0;
			//if output set and no template, don't use split range
			if (outName) {
				xs_a = strchr(outName, '$');
				if (!xs_a || !strchr(xs_a+1, '$'))
					use_splitrange = GF_FALSE;
			}
		} else if (split_until_end) {
			Double end=0;
			if (split_dur<-2) {
				end = (Double) gf_isom_get_duration(mp4);
				end /= gf_isom_get_timescale(mp4);
				split_dur = -2 - split_dur;
				if (end > split_dur) end-=split_dur;
				else end = 0;
			}
			if (end>0) {
				sprintf(szArgs, ":xs=%u/1000:xe=%u/1000", (u32) (chunk_start*1000), (u32) (end * 1000) );
			} else {
				sprintf(szArgs, ":xs=%u/1000", (u32) (chunk_start*1000));
			}
		} else {
			sprintf(szArgs, ":xs=%u/1000:xe=%u/1000", (u32) (chunk_start*1000), (u32) ((chunk_start+split_dur) * 1000) );
		}
		if (szArgs[0])
			gf_dynstrcat(&filter_args, szArgs, NULL);

		if (!outName) {
			sprintf(szFile, "%s_$FS$", szName);
		}
	} else if (split_dur) {
		sprintf(szArgs, ":xs=D%g", split_dur);
		gf_dynstrcat(&filter_args, szArgs, NULL);
		if (adjust_split_end) {
			gf_dynstrcat(&filter_args, ":xadjust", NULL);
		}
	} else {
		gf_fs_del(fs);
		gf_free(filter_args);
		M4_LOG(GF_LOG_ERROR, ("Unrecognized split syntax\n"));
		return GF_BAD_PARAM;
	}

	if (use_splitrange)
		gf_dynstrcat(&filter_args, ":splitrange", NULL);

	reframe = gf_fs_load_filter(fs, filter_args, &e);
	gf_free(filter_args);
	filter_args = NULL;
	if (!reframe) {
		M4_LOG(GF_LOG_ERROR, ("Failed to load reframer filter: %s\n", gf_error_to_string(e) ));
		gf_fs_del(fs);
		return e;
	}

	if (!outName) {
		strcat(szFile, ".mp4");
	} else {
		strcpy(szFile, outName);
	}
	if (gf_dir_exists(szFile)) {
		char c = szFile[strlen(szFile)-1];
		if ((c!='/') && (c!='\\'))
			strcat(szFile, "/");

		strcat(szFile, szName);
		strcat(szFile, "_$num%03d$.mp4");
		M4_LOG(GF_LOG_WARNING, ("Split output is a directory, will use template %s\n", szFile));
	}
	else if (split_size_kb || split_dur) {
		if (!strchr(szFile, '$') && (stricmp(szFile, "null") || !strcmp(szFile, "/dev/null")) ) {
			char *sep = gf_file_ext_start(szFile);
			if (sep) sep[0] = 0;
			strcat(szFile, "_$num$.mp4");
			M4_LOG(GF_LOG_WARNING, ("Split by %s but output not a template, using %s as output\n", split_size_kb ? "size" : "duration", szFile));
		}
	}
	if (do_frag) {
		sprintf(szArgs, ":cdur=%g", interleaving_time);
		strcat(szFile, ":store=frag");
		strcat(szFile, szArgs);
	}
	else if (do_flat==1) {
		strcat(szFile, ":store=flat");
	}
	else if (do_flat || interleaving_time) {
		if (do_flat==3) {
			strcat(szFile, ":store=fstart");
		}
		sprintf(szArgs, ":cdur=%g", interleaving_time);
		strcat(szFile, szArgs);
	}
	if (use_mfra)
		strcat(szFile, ":mfra");

	dst = gf_fs_load_destination(fs, szFile, NULL, NULL, &e);
	if (!dst) {
		M4_LOG(GF_LOG_ERROR, ("Failed to load destination filter: %s\n", gf_error_to_string(e) ));
		gf_fs_del(fs);
		return e;
	}
	//link reframer to dst
	gf_filter_set_source(dst, reframe, NULL);

	if (!gf_sys_is_test_mode()
#ifndef GPAC_DISABLE_LOG
		&& (gf_log_get_tool_level(GF_LOG_APP)!=GF_LOG_QUIET)
#endif
		&& !gf_sys_is_quiet()
	) {
		gf_fs_enable_reporting(fs, GF_TRUE);
		gf_fs_set_ui_callback(fs, on_split_event, &sinfo);
	}
#ifdef GPAC_ENABLE_COVERAGE
	else if (gf_sys_is_cov_mode()) {
		on_split_event(NULL, NULL);
	}
#endif //GPAC_ENABLE_COVERAGE


	e = gf_fs_run(fs);
	if (e>=GF_OK) {
		e = gf_fs_get_last_connect_error(fs);
		if (e>=GF_OK)
			e = gf_fs_get_last_process_error(fs);
	}
	gf_fs_print_non_connected(fs);
	if (fs_dump_flags & 1) gf_fs_print_stats(fs);
	if (fs_dump_flags & 2) gf_fs_print_connections(fs);

	gf_fs_del(fs);

	if (e<GF_OK)
		M4_LOG(GF_LOG_ERROR, ("Split failed: %s\n", gf_error_to_string(e) ));
	return e;
}

GF_Err cat_multiple_files(GF_ISOFile *dest, char *fileName, u32 import_flags, GF_Fraction force_fps, u32 frames_per_sample, Bool force_cat, Bool align_timelines, Bool allow_add_in_command);

static Bool merge_parameter_set(GF_List *src, GF_List *dst, const char *name)
{
	u32 j, k;
	for (j=0; j<gf_list_count(src); j++) {
		Bool found = 0;
		GF_NALUFFParam *slc = gf_list_get(src, j);
		for (k=0; k<gf_list_count(dst); k++) {
			GF_NALUFFParam *slc_dst = gf_list_get(dst, k);
			if ( (slc->size==slc_dst->size) && !memcmp(slc->data, slc_dst->data, slc->size) ) {
				found = 1;
				break;
			}
		}
		if (!found) {
			return GF_FALSE;
		}
	}
	return GF_TRUE;
}

static u32 merge_avc_config(GF_ISOFile *dest, u32 tk_id, GF_ISOFile **o_orig, u32 src_track, Bool force_cat, u32 *orig_nal_len, u32 *dst_nal_len)
{
	GF_AVCConfig *avc_src, *avc_dst;
	GF_ISOFile *orig = *o_orig;
	u32 dst_tk = gf_isom_get_track_by_id(dest, tk_id);

	avc_src = gf_isom_avc_config_get(orig, src_track, 1);
	avc_dst = gf_isom_avc_config_get(dest, dst_tk, 1);

	if (avc_src && avc_dst) {

		if (!force_cat && (avc_src->AVCLevelIndication!=avc_dst->AVCLevelIndication)) {
			dst_tk = 0;
		} else if (!force_cat && (avc_src->AVCProfileIndication!=avc_dst->AVCProfileIndication)) {
			dst_tk = 0;
		}
		else {
			/*rewrite all samples if using different NALU size*/
			if (avc_src->nal_unit_size > avc_dst->nal_unit_size) {
				gf_media_nal_rewrite_samples(dest, dst_tk, 8*avc_src->nal_unit_size);
				avc_dst->nal_unit_size = avc_src->nal_unit_size;
			} else if (avc_src->nal_unit_size < avc_dst->nal_unit_size) {
				*orig_nal_len = avc_src->nal_unit_size;
				*dst_nal_len = avc_dst->nal_unit_size;
			}

			/*merge PS*/
			if (!merge_parameter_set(avc_src->sequenceParameterSets, avc_dst->sequenceParameterSets, "SPS"))
				dst_tk = 0;
			if (!merge_parameter_set(avc_src->pictureParameterSets, avc_dst->pictureParameterSets, "PPS"))
				dst_tk = 0;

			gf_isom_avc_config_update(dest, dst_tk, 1, avc_dst);
		}

	}
	gf_odf_avc_cfg_del(avc_src);
	gf_odf_avc_cfg_del(avc_dst);


	if (!dst_tk) {
		dst_tk = gf_isom_get_track_by_id(dest, tk_id);
		gf_isom_set_nalu_extract_mode(orig, src_track, GF_ISOM_NALU_EXTRACT_INBAND_PS_FLAG);
		if (!force_cat) {
			//set inband config but keep param sets
			gf_isom_avc_set_inband_config(dest, dst_tk, 1, GF_TRUE);
		} else {
			M4_LOG(GF_LOG_WARNING, ("WARNING: Concatenating track ID %d even though sample descriptions do not match\n", tk_id));
		}
	}
	return dst_tk;
}

static u32 merge_hevc_config(GF_ISOFile *dest, u32 tk_id, GF_ISOFile **o_orig, u32 src_track, Bool force_cat, u32 *orig_nal_len, u32 *dst_nal_len)
{
	u32 i;
	GF_HEVCConfig *hevc_src, *hevc_dst;
	GF_ISOFile *orig = *o_orig;
	u32 dst_tk = gf_isom_get_track_by_id(dest, tk_id);

	hevc_src = gf_isom_hevc_config_get(orig, src_track, 1);
	hevc_dst = gf_isom_hevc_config_get(dest, dst_tk, 1);

	if (hevc_src->profile_idc != hevc_dst->profile_idc) dst_tk = 0;
	else if (hevc_src->level_idc != hevc_dst->level_idc) dst_tk = 0;
	else if (hevc_src->general_profile_compatibility_flags != hevc_dst->general_profile_compatibility_flags ) dst_tk = 0;
	else {
		/*rewrite all samples if using different NALU size*/
		if (hevc_src->nal_unit_size > hevc_dst->nal_unit_size) {
			gf_media_nal_rewrite_samples(dest, dst_tk, 8*hevc_src->nal_unit_size);
			hevc_dst->nal_unit_size = hevc_src->nal_unit_size;
		} else if (hevc_src->nal_unit_size < hevc_dst->nal_unit_size) {
			*orig_nal_len = hevc_src->nal_unit_size;
			*dst_nal_len = hevc_dst->nal_unit_size;
		}

		/*merge PS*/
		for (i=0; i<gf_list_count(hevc_src->param_array); i++) {
			u32 k;
			GF_NALUFFParamArray *src_ar = gf_list_get(hevc_src->param_array, i);
			for (k=0; k<gf_list_count(hevc_dst->param_array); k++) {
				GF_NALUFFParamArray *dst_ar = gf_list_get(hevc_dst->param_array, k);
				if (dst_ar->type==src_ar->type) {
					if (!merge_parameter_set(src_ar->nalus, dst_ar->nalus, "SPS"))
						dst_tk = 0;
					break;
				}
			}
		}

		gf_isom_hevc_config_update(dest, dst_tk, 1, hevc_dst);
	}

	gf_odf_hevc_cfg_del(hevc_src);
	gf_odf_hevc_cfg_del(hevc_dst);

	if (!dst_tk) {
		dst_tk = gf_isom_get_track_by_id(dest, tk_id);
		gf_isom_set_nalu_extract_mode(orig, src_track, GF_ISOM_NALU_EXTRACT_INBAND_PS_FLAG);
		if (!force_cat) {
			gf_isom_hevc_set_inband_config(dest, dst_tk, 1, GF_TRUE);
		} else {
			M4_LOG(GF_LOG_WARNING, ("WARNING: Concatenating track ID %d even though sample descriptions do not match\n", tk_id));
		}
	}
	return dst_tk;
}

static GF_Err rewrite_nal_size_field(GF_ISOSample *samp, u32 orig_nal_len, u32 dst_nal_len)
{
	GF_Err e = GF_OK;
	u32 msize=0, remain = samp->dataLength;
	GF_BitStream *oldbs = gf_bs_new(samp->data, samp->dataLength, GF_BITSTREAM_READ);
	GF_BitStream *newbs = gf_bs_new(NULL, 0, GF_BITSTREAM_WRITE);
	u8 *buffer = NULL;

	while (remain) {
		u32 size = gf_bs_read_int(oldbs, orig_nal_len*8);
		if (size > remain) {
			e = GF_ISOM_INVALID_FILE;
			goto exit;
		}
		gf_bs_write_int(newbs, size, dst_nal_len*8);
		remain -= orig_nal_len;
		if (size > msize) {
			msize = size;
			buffer = (u8*)gf_realloc(buffer, sizeof(u8)*msize);
			if (!buffer) {
				e = GF_OUT_OF_MEM;
				goto exit;
			}
		}
		gf_bs_read_data(oldbs, buffer, size);
		gf_bs_write_data(newbs, buffer, size);
		remain -= size;
	}
	gf_free(samp->data);
	samp->data = NULL;
	samp->dataLength = 0;
	gf_bs_get_content(newbs, &samp->data, &samp->dataLength);

exit:
	gf_bs_del(newbs);
	gf_bs_del(oldbs);
	if (buffer) gf_free(buffer);
	return e;
}


GF_Err cat_playlist(GF_ISOFile *dest, char *playlistName, u32 import_flags, GF_Fraction force_fps, u32 frames_per_sample, Bool force_cat, Bool align_timelines, Bool allow_add_in_command);

GF_Err cat_isomedia_file(GF_ISOFile *dest, char *fileName, u32 import_flags, GF_Fraction force_fps, u32 frames_per_sample, Bool force_cat, Bool align_timelines, Bool allow_add_in_command, Bool is_pl)
{
	u32 i, j, count, nb_tracks, nb_samp, nb_done;
	GF_ISOFile *orig;
	GF_Err e;
	char *opts, *multi_cat;
	Double ts_scale, media_ts_scale;
	Double dest_orig_dur;
	u32 dst_tk, tk_id, mtype;
	u64 insert_dts;
	Bool is_isom;
	GF_ISOSample *samp;
	GF_Fraction64 aligned_to_DTS_frac;

	if (is_pl) return cat_playlist(dest, fileName, import_flags, force_fps, frames_per_sample, force_cat, align_timelines, allow_add_in_command);

	if (strchr(fileName, '*') || (strchr(fileName, '@')) )
		return cat_multiple_files(dest, fileName, import_flags, force_fps, frames_per_sample, force_cat, align_timelines, allow_add_in_command);

	multi_cat = allow_add_in_command ? strchr(fileName, '+') : NULL;
	if (multi_cat) {
		multi_cat[0] = 0;
		multi_cat = &multi_cat[1];
	}

	opts = gf_url_colon_suffix(fileName, '=');
	e = GF_OK;

	/*if options are specified, re-import the file*/
	if (opts) opts[0] = 0;
	is_isom = gf_isom_probe_file(fileName);

	if (!is_isom || multi_cat) {
		orig = gf_isom_open("temp", GF_ISOM_WRITE_EDIT, NULL);
		if (opts) opts[0] = ':';
		e = import_file(orig, fileName, import_flags, force_fps, frames_per_sample, NULL, NULL, NULL, 0);
		if (e) {
			gf_isom_delete(orig);
			return e;
		}
	} else {
		//open read+edit mode to allow applying options on file
		orig = gf_isom_open(fileName, GF_ISOM_OPEN_READ_EDIT, NULL);
		if (opts) opts[0] = ':';
		if (!orig) return gf_isom_last_error(NULL);

		if (opts) {
			e = import_file(orig, fileName, 0xFFFFFFFF, force_fps, frames_per_sample, NULL, NULL, NULL, 0);
			if (e) {
				gf_isom_delete(orig);
				return e;
			}
		}
	}

	while (multi_cat) {
		char *sep = strchr(multi_cat, '+');
		if (sep) sep[0] = 0;

		e = import_file(orig, multi_cat, import_flags, force_fps, frames_per_sample, NULL, NULL, NULL, 0);
		if (e) {
			gf_isom_delete(orig);
			return e;
		}
		if (!sep) break;
		sep[0]=':';
		multi_cat = sep+1;
	}

	nb_samp = 0;
	nb_tracks = gf_isom_get_track_count(orig);
	for (i=0; i<nb_tracks; i++) {
		mtype = gf_isom_get_media_type(orig, i+1);
		switch (mtype) {
		case GF_ISOM_MEDIA_HINT:
		case GF_ISOM_MEDIA_OD:
		case GF_ISOM_MEDIA_FLASH:
			M4_LOG(GF_LOG_WARNING, ("WARNING: Track ID %d (type %s) not handled by concatenation - removing from destination\n", gf_isom_get_track_id(orig, i+1), gf_4cc_to_str(mtype)));
			continue;
		case GF_ISOM_MEDIA_AUDIO:
		case GF_ISOM_MEDIA_TEXT:
		case GF_ISOM_MEDIA_SUBT:
		case GF_ISOM_MEDIA_MPEG_SUBT:
		case GF_ISOM_MEDIA_VISUAL:
        case GF_ISOM_MEDIA_AUXV:
        case GF_ISOM_MEDIA_PICT:
		case GF_ISOM_MEDIA_SCENE:
		case GF_ISOM_MEDIA_OCR:
		case GF_ISOM_MEDIA_OCI:
		case GF_ISOM_MEDIA_IPMP:
		case GF_ISOM_MEDIA_MPEGJ:
		case GF_ISOM_MEDIA_MPEG7:
		default:
			/*only cat self-contained files*/
			if (gf_isom_is_self_contained(orig, i+1, 1)) {
				nb_samp+= gf_isom_get_sample_count(orig, i+1);
				break;
			}
			break;
		}
	}
	if (!nb_samp) {
		M4_LOG(GF_LOG_ERROR, ("No suitable media tracks to cat in %s - skipping\n", fileName));
		goto err_exit;
	}

	dest_orig_dur = (Double) (s64) gf_isom_get_duration(dest);
	if (!gf_isom_get_timescale(dest)) {
		gf_isom_set_timescale(dest, gf_isom_get_timescale(orig));
	}
	dest_orig_dur /= gf_isom_get_timescale(dest);

	aligned_to_DTS_frac.num = 0;
	aligned_to_DTS_frac.den = 1;
	for (i=0; i<gf_isom_get_track_count(dest); i++) {
		u32 last_samp = gf_isom_get_sample_count(dest, i+1);
		if (!last_samp) continue;
		//get next sample DTS - we do NOT use media duration as CTS offset could shift up everything
		u64 track_dur = gf_isom_get_sample_dts(dest, i+1, last_samp);
		track_dur += gf_isom_get_sample_duration(dest, i+1, last_samp);
		u32 track_ts = gf_isom_get_media_timescale(dest, i+1);
		if (gf_timestamp_less(aligned_to_DTS_frac.num, aligned_to_DTS_frac.den, track_dur, track_ts)) {
			aligned_to_DTS_frac.num = track_dur;
			aligned_to_DTS_frac.den = track_ts;
		}
	}

	M4_LOG(GF_LOG_INFO, ("Appending file %s\n", fileName));
	nb_done = 0;
	for (i=0; i<nb_tracks; i++) {
		u64 last_DTS, dest_track_dur_before_cat;
		u32 nb_edits = 0;
		Bool merge_nal_video = 1;
		Bool skip_lang_test = 1;
		Bool use_ts_dur = 1;
		Bool merge_edits = 0;
		Bool new_track = 0;
		u32 dst_tk_sample_entry = 0;
		u32 orig_nal_len = 0;
		u32 dst_nal_len = 0;
		mtype = gf_isom_get_media_type(orig, i+1);
		switch (mtype) {
		case GF_ISOM_MEDIA_HINT:
		case GF_ISOM_MEDIA_OD:
		case GF_ISOM_MEDIA_FLASH:
			continue;
		case GF_ISOM_MEDIA_TEXT:
		case GF_ISOM_MEDIA_SUBT:
		case GF_ISOM_MEDIA_MPEG_SUBT:
		case GF_ISOM_MEDIA_SCENE:
		case GF_ISOM_MEDIA_TIMECODE:
			use_ts_dur = 0;
		case GF_ISOM_MEDIA_AUDIO:
		case GF_ISOM_MEDIA_VISUAL:
        case GF_ISOM_MEDIA_PICT:
		case GF_ISOM_MEDIA_OCR:
		case GF_ISOM_MEDIA_OCI:
		case GF_ISOM_MEDIA_IPMP:
		case GF_ISOM_MEDIA_MPEGJ:
		case GF_ISOM_MEDIA_MPEG7:
		default:
			if (!gf_isom_is_self_contained(orig, i+1, 1)) continue;
			break;
		}

		dst_tk = 0;
		/*if we had a temporary import of the file, check if the original track ID matches the dst one. If so, skip all language detection code*/
		tk_id = gf_isom_get_track_original_id(orig, i+1);
		if (!tk_id) {
			tk_id = gf_isom_get_track_id(orig, i+1);
			skip_lang_test = 0;
		}
		dst_tk = gf_isom_get_track_by_id(dest, tk_id);


		if (dst_tk) {
			if (mtype != gf_isom_get_media_type(dest, dst_tk))
				dst_tk = 0;
			else {
				u32 subtype_dst = gf_isom_get_media_subtype(dest, dst_tk, 1);
				u32 subtype_src = gf_isom_get_media_subtype(orig, i+1, 1);
				if (subtype_dst==GF_ISOM_SUBTYPE_AVC3_H264)
					subtype_dst=GF_ISOM_SUBTYPE_AVC_H264 ;
				if (subtype_src==GF_ISOM_SUBTYPE_AVC3_H264)
					subtype_src=GF_ISOM_SUBTYPE_AVC_H264;

				if (subtype_dst==GF_ISOM_SUBTYPE_HEV1)
					subtype_dst=GF_ISOM_SUBTYPE_HVC1;
				if (subtype_src==GF_ISOM_SUBTYPE_HEV1)
					subtype_src=GF_ISOM_SUBTYPE_HVC1;

				if (subtype_dst==GF_ISOM_SUBTYPE_VVI1)
					subtype_dst=GF_ISOM_SUBTYPE_VVC1;
				if (subtype_src==GF_ISOM_SUBTYPE_VVI1)
					subtype_src=GF_ISOM_SUBTYPE_VVC1;

				if (subtype_dst != subtype_src) {
					dst_tk_sample_entry = dst_tk;
					dst_tk = 0;
					merge_nal_video=0;
				}
			}
		}

		if (!dst_tk) {
			for (j=0; j<gf_isom_get_track_count(dest); j++) {
				if (mtype != gf_isom_get_media_type(dest, j+1)) continue;
				if (gf_isom_is_same_sample_description(orig, i+1, 0, dest, j+1, 0)) {
					if (gf_isom_is_video_handler_type(mtype) ) {
						u32 w, h, ow, oh;
						gf_isom_get_visual_info(orig, i+1, 1, &ow, &oh);
						gf_isom_get_visual_info(dest, j+1, 1, &w, &h);
						if ((ow==w) && (oh==h)) {
							dst_tk = j+1;
							dst_tk_sample_entry = 0;
							break;
						}
					}
					/*check language code*/
					else if (!skip_lang_test && (mtype==GF_ISOM_MEDIA_AUDIO)) {
						u32 lang_src, lang_dst;
						char *lang = NULL;
						gf_isom_get_media_language(orig, i+1, &lang);
						if (lang) {
							lang_src = GF_4CC(lang[0], lang[1], lang[2], lang[3]);
							gf_free(lang);
						} else {
							lang_src = 0;
						}
						gf_isom_get_media_language(dest, j+1, &lang);
						if (lang) {
							lang_dst = GF_4CC(lang[0], lang[1], lang[2], lang[3]);
							gf_free(lang);
						} else {
							lang_dst = 0;
						}
						if (lang_dst==lang_src) {
							dst_tk = j+1;
							dst_tk_sample_entry = 0;
							break;
						}
					} else {
						dst_tk = j+1;
						dst_tk_sample_entry = 0;
						break;
					}
				}
			}
		}

		if (dst_tk_sample_entry)
			dst_tk = dst_tk_sample_entry;

		if (dst_tk) {
			u32 found_dst_tk = dst_tk;
			u32 stype = gf_isom_get_media_subtype(dest, dst_tk, 1);
			/*we MUST have the same codec*/
			if (gf_isom_get_media_subtype(orig, i+1, 1) != stype) dst_tk = 0;
			/*we only support cat with the same number of sample descriptions*/
			if (gf_isom_get_sample_description_count(orig, i+1) != gf_isom_get_sample_description_count(dest, dst_tk)) dst_tk = 0;
			/*if not forcing cat, check the media codec config is the same*/
			if (!gf_isom_is_same_sample_description(orig, i+1, 0, dest, dst_tk, 0)) {
				//we will need to merge the same descriptions
				if (!force_cat && !dst_tk_sample_entry) dst_tk_sample_entry = dst_tk;
				dst_tk = 0;
			}
			/*we force the same visual resolution*/
			else if (gf_isom_is_video_handler_type(mtype) ) {
				u32 w, h, ow, oh;
				gf_isom_get_visual_info(orig, i+1, 1, &ow, &oh);
				gf_isom_get_visual_info(dest, dst_tk, 1, &w, &h);
				if ((ow!=w) || (oh!=h)) {
					dst_tk = 0;
				}
			}

			if (!dst_tk && merge_nal_video) {
				/*merge AVC config if possible*/
				if ((stype == GF_ISOM_SUBTYPE_AVC_H264)
				        || (stype == GF_ISOM_SUBTYPE_AVC2_H264)
				        || (stype == GF_ISOM_SUBTYPE_AVC3_H264)
				        || (stype == GF_ISOM_SUBTYPE_AVC4_H264) ) {
					dst_tk = merge_avc_config(dest, tk_id, &orig, i+1, force_cat, &orig_nal_len, &dst_nal_len);
				}
				/*merge HEVC config if possible*/
				else if ((stype == GF_ISOM_SUBTYPE_HVC1)
				         || (stype == GF_ISOM_SUBTYPE_HEV1)
				         || (stype == GF_ISOM_SUBTYPE_HVC2)
				         || (stype == GF_ISOM_SUBTYPE_HEV2)) {
					dst_tk = merge_hevc_config(dest, tk_id, &orig, i+1, force_cat, &orig_nal_len, &dst_nal_len);
				}
				else if (force_cat) {
					dst_tk = found_dst_tk;
				}
			}
		}

		if (dst_tk_sample_entry && !dst_tk) {
			u32 k, nb_sample_desc = gf_isom_get_sample_description_count(orig, i+1);
			dst_tk = dst_tk_sample_entry;
			M4_LOG(GF_LOG_INFO, ("Multiple sample entry required, merging\n"));
			for (k=0; k<nb_sample_desc; k++) {
				u32 sdesc_idx;
				e = gf_isom_clone_sample_description(dest, dst_tk, orig, i+1, k+1, NULL, NULL, &sdesc_idx);
				if (e) goto err_exit;
				//remember idx of first new added sample desc
				if (!k)
					dst_tk_sample_entry = sdesc_idx-1;
			}
		} else {
			dst_tk_sample_entry = 0;
		}

		/*looks like a new track*/
		if (!dst_tk) {
			M4_LOG(GF_LOG_INFO, ("No suitable destination track found - creating new one (type %s)\n", gf_4cc_to_str(mtype)));
			e = gf_isom_clone_track(orig, i+1, dest, 0, &dst_tk);
			if (e) goto err_exit;
			gf_isom_clone_pl_indications(orig, dest);
			new_track = 1;

			if (align_timelines) {
				u32 max_timescale = 0;
//				u32 dst_timescale = 0;
				u32 idx;
				for (idx=0; idx<nb_tracks; idx++) {
					if (max_timescale < gf_isom_get_media_timescale(orig, idx+1))
						max_timescale = gf_isom_get_media_timescale(orig, idx+1);
				}
#if 0
				if (dst_timescale < max_timescale) {
					dst_timescale = gf_isom_get_media_timescale(dest, dst_tk);
					idx = max_timescale / dst_timescale;
					if (dst_timescale * idx < max_timescale) idx ++;
					dst_timescale *= idx;

					gf_isom_set_media_timescale(dest, dst_tk, max_timescale, 0, 0);
				}
#else
				gf_isom_set_media_timescale(dest, dst_tk, max_timescale, 0, 0);
#endif
			}

			/*remove cloned edit list, as it will be rewritten after import*/
			gf_isom_remove_edits(dest, dst_tk);
		} else {
			nb_edits = gf_isom_get_edits_count(orig, i+1);
		}

		dest_track_dur_before_cat = gf_isom_get_media_duration(dest, dst_tk);
		count = gf_isom_get_sample_count(dest, dst_tk);

		if (align_timelines) {
			insert_dts = (u64) (aligned_to_DTS_frac.num * gf_isom_get_media_timescale(dest, dst_tk));
			insert_dts /= aligned_to_DTS_frac.den;
		} else if (use_ts_dur && (count>1)) {
			insert_dts = 2*gf_isom_get_sample_dts(dest, dst_tk, count) - gf_isom_get_sample_dts(dest, dst_tk, count-1);
		} else {
			insert_dts = dest_track_dur_before_cat;
			if (!count) insert_dts = 0;
		}

		ts_scale = gf_isom_get_media_timescale(dest, dst_tk);
		ts_scale /= gf_isom_get_media_timescale(orig, i+1);
		media_ts_scale = gf_isom_get_media_timescale(dest, dst_tk);
		media_ts_scale /= gf_isom_get_media_timescale(orig, i+1);

		/*if not a new track, see if we can merge the edit list - this is a crude test that only checks
		we have the same edit types*/
		if (nb_edits && (nb_edits == gf_isom_get_edits_count(dest, dst_tk)) ) {
			u64 editTime, segmentDuration, mediaTime, dst_editTime, dst_segmentDuration, dst_mediaTime;
			GF_ISOEditType dst_editMode, editMode;
			merge_edits = 1;
			for (j=0; j<nb_edits; j++) {
				gf_isom_get_edit(orig, i+1, j+1, &editTime, &segmentDuration, &mediaTime, &editMode);
				gf_isom_get_edit(dest, dst_tk, j+1, &dst_editTime, &dst_segmentDuration, &dst_mediaTime, &dst_editMode);

				if (dst_editMode!=editMode) {
					merge_edits=0;
					break;
				}
			}
		}

		gf_isom_enable_raw_pack(orig, i+1, 2048);

		Bool adjust_first_sample=GF_FALSE;
		if (count && (gf_isom_get_sample_duration(dest, dst_tk, count)==0)) {
			adjust_first_sample = GF_TRUE;
		}
		last_DTS = 0;
		count = gf_isom_get_sample_count(orig, i+1);
		for (j=0; j<count; j++) {
			u32 di;
			samp = gf_isom_get_sample(orig, i+1, j+1, &di);
			if (!samp) {
				e = gf_isom_last_error(orig);
				if (!e) e = GF_OUT_OF_MEM;
				goto err_exit;
			}
			last_DTS = samp->DTS;
			samp->DTS =  (u64) (ts_scale * samp->DTS + (new_track ? 0 : insert_dts));
			samp->CTS_Offset =  (u32) (samp->CTS_Offset * ts_scale);
			if (adjust_first_sample) {
				samp->DTS++;
				adjust_first_sample = 0;
			}

			if (gf_isom_is_self_contained(orig, i+1, di)) {
				if (orig_nal_len && dst_nal_len) {
					e = rewrite_nal_size_field(samp, orig_nal_len, dst_nal_len);
					if (e) {
						gf_isom_sample_del(&samp);
						goto err_exit;
					}
				}
				e = gf_isom_add_sample(dest, dst_tk, di + dst_tk_sample_entry, samp);
			} else {
				u64 offset;
				GF_ISOSample *s = gf_isom_get_sample_info(orig, i+1, j+1, &di, &offset);
				e = gf_isom_add_sample_reference(dest, dst_tk, di + dst_tk_sample_entry, samp, offset);
				gf_isom_sample_del(&s);
			}
			if (samp->nb_pack)
				j+= samp->nb_pack-1;

			if (samp->data && !samp->dataLength) {
				// force deletetion, see gf_isom_sample_del()
				samp->dataLength = samp->alloc_size;
			}
			gf_isom_sample_del(&samp);
			if (e) goto err_exit;

			e = gf_isom_copy_sample_info(dest, dst_tk, orig, i+1, j+1);
			if (e) goto err_exit;

			if (j+1==count) {
				u32 sdur = gf_isom_get_sample_duration(orig, i+1, j+1);
				gf_isom_set_last_sample_duration(dest, dst_tk, (u32) (ts_scale * sdur) );
			}

			gf_set_progress("Appending", nb_done, nb_samp);
			nb_done++;
		}
		gf_isom_update_duration(dest);

		/*scene description and text: compute last sample duration based on original media duration*/
		if (!use_ts_dur) {
			u64 extend_dur = gf_isom_get_media_duration(orig, i+1) - last_DTS;
			//extend the duration of the last sample, but don't insert any edit list entry
			gf_isom_set_last_sample_duration(dest, dst_tk, (u32) (ts_scale*extend_dur) );
		}

		if (new_track && insert_dts) {
			u64 media_dur = gf_isom_get_media_duration(orig, i+1);
			/*convert from media time to track time*/
			Double rescale = (Float) gf_isom_get_timescale(dest);
			rescale /= (Float) gf_isom_get_media_timescale(dest, dst_tk);
			/*convert from orig to dst time scale*/
			rescale *= ts_scale;

			gf_isom_set_edit(dest, dst_tk, 0, (u64) (s64) (insert_dts*rescale), 0, GF_ISOM_EDIT_EMPTY);
			gf_isom_set_edit(dest, dst_tk, (u64) (s64) (insert_dts*rescale), (u64) (s64) (media_dur*rescale), 0, GF_ISOM_EDIT_NORMAL);
		} else if (merge_edits) {

			/*get the first edit normal mode and add the new track dur*/
			for (j=nb_edits; j>0; j--) {
				u64 editTime, segmentDuration, mediaTime;
				GF_ISOEditType editMode;
				gf_isom_get_edit(dest, dst_tk, j, &editTime, &segmentDuration, &mediaTime, &editMode);

				if (editMode==GF_ISOM_EDIT_NORMAL) {
					u64 new_dur = gf_isom_get_media_duration(dest, dst_tk);
					if ((mediaTime>0) && (mediaTime<new_dur))
						new_dur -= mediaTime;
					/*convert from media time to track/moov time*/
					u32 movts_dst = gf_isom_get_timescale(dest);
					u32 trackts_dst = gf_isom_get_media_timescale(dest, dst_tk);
					new_dur = gf_timestamp_rescale(new_dur, trackts_dst, movts_dst);
					gf_isom_modify_edit(dest, dst_tk, j, new_dur, mediaTime, editMode);
					break;
				}
			}
		} else {
			u64 editTime, segmentDuration, mediaTime, edit_offset;
			Double t;
			GF_ISOEditType editMode;

			count = gf_isom_get_edits_count(dest, dst_tk);
			if (count) {
				e = gf_isom_get_edit(dest, dst_tk, count, &editTime, &segmentDuration, &mediaTime, &editMode);
				if (e) {
					M4_LOG(GF_LOG_ERROR, ("Error: edit segment error on destination track %u could not be retrieved.\n", dst_tk));
					goto err_exit;
				}
			} else if (gf_isom_get_edits_count(orig, i+1)) {
				/*fake empty edit segment*/
				/*convert from media time to track time*/
				Double rescale = (Float) gf_isom_get_timescale(dest);
				rescale /= (Float) gf_isom_get_media_timescale(dest, dst_tk);
				segmentDuration = (u64) (dest_track_dur_before_cat * rescale);
				editTime = 0;
				mediaTime = 0;
				if (segmentDuration)
					gf_isom_set_edit(dest, dst_tk, editTime, segmentDuration, mediaTime, GF_ISOM_EDIT_NORMAL);
			} else {
				mediaTime = 0;
				editTime = 0;
				segmentDuration = 0;
			}

			/*convert to dst time scale*/
			ts_scale = (Float) gf_isom_get_timescale(dest);
			ts_scale /= (Float) gf_isom_get_timescale(orig);

			edit_offset = editTime + segmentDuration;
			count = gf_isom_get_edits_count(orig, i+1);
			for (j=0; j<count; j++) {
				gf_isom_get_edit(orig, i+1, j+1, &editTime, &segmentDuration, &mediaTime, &editMode);
				t = (Double) (s64) editTime;
				t *= ts_scale;
				t += (s64) edit_offset;
				editTime = (s64) t;
				t = (Double) (s64) segmentDuration;
				t *= ts_scale;
				segmentDuration = (s64) t;
				t = (Double) (s64) mediaTime;
				//we are in media time, apply media ts scale, not file ts scale
				t *= media_ts_scale;
				t+= (s64) dest_track_dur_before_cat;
				mediaTime = (s64) t;
				if ((editMode == GF_ISOM_EDIT_EMPTY) && (mediaTime > 0)) {
					editMode = GF_ISOM_EDIT_NORMAL;
				}
				gf_isom_set_edit(dest, dst_tk, editTime, segmentDuration, mediaTime, editMode);
			}
			//no edit in added track, add duration
			if (!count && (segmentDuration || mediaTime) && gf_isom_get_edits_count(dest, dst_tk)) {
				t = (Double) (s64) gf_isom_get_media_duration(orig, i+1);
				t *= gf_isom_get_timescale(dest);
				t /= gf_isom_get_media_timescale(orig, i+1);
				gf_isom_set_edit(dest, dst_tk, editTime, segmentDuration+(u64) t, mediaTime, editMode);
			}
		}
		gf_media_update_bitrate(dest, dst_tk);

	}
	for (i = 0; i < gf_isom_get_track_count(dest); ++i) {
		if (gf_isom_get_media_type(dest, i+1) == GF_ISOM_MEDIA_TIMECODE) {
			u32 video_ref = 0;
			for (j = 0; j < gf_isom_get_track_count(dest); ++j) {
				if (gf_isom_is_video_handler_type(gf_isom_get_media_type(dest, j+1))) {
					video_ref = j+1;
					break;
				}
			}
			if (video_ref) {
				u64 video_ref_dur = gf_isom_get_media_duration(dest, video_ref);
				u32 last_sample_dur = gf_isom_get_sample_duration(dest, i+1, gf_isom_get_sample_count(dest, i+1));
				u64 dur = video_ref_dur - gf_isom_get_media_duration(dest, i+1) + last_sample_dur;
				gf_isom_set_last_sample_duration(dest, i+1, (u32)dur);
			}
		}
	}
	gf_set_progress("Appending", nb_samp, nb_samp);

	/*check brands*/
	gf_isom_get_brand_info(orig, NULL, NULL, &j);
	for (i=0; i<j; i++) {
		u32 brand;
		gf_isom_get_alternate_brand(orig, i+1, &brand);
		gf_isom_modify_alternate_brand(dest, brand, GF_TRUE);
	}
	/*check chapters*/
	for (i=0; i<gf_isom_get_chapter_count(orig, 0); i++) {
		char *name;
		Double c_time;
		u64 chap_time;
		gf_isom_get_chapter(orig, 0, i+1, &chap_time, (const char **) &name);
		c_time = (Double) (s64) chap_time;
		c_time /= 1000;
		c_time += dest_orig_dur;

		/*check last file chapter*/
		if (!i && gf_isom_get_chapter_count(dest, 0)) {
			const char *last_name;
			u64 last_chap_time;
			gf_isom_get_chapter(dest, 0, gf_isom_get_chapter_count(dest, 0), &last_chap_time, &last_name);
			/*last and first chapters are the same, don't duplicate*/
			if (last_name && name && !stricmp(last_name, name)) continue;
		}

		chap_time = (u64) (c_time*1000);
		gf_isom_add_chapter(dest, 0, chap_time, name);
	}


err_exit:
	gf_isom_delete(orig);
	return e;
}

typedef struct
{
	char szPath[GF_MAX_PATH];
	char szRad1[1024], szRad2[1024], szOpt[200];
	GF_ISOFile *dest;
	u32 import_flags;
	GF_Fraction force_fps;
	u32 frames_per_sample;
	Bool force_cat, align_timelines, allow_add_in_command;
} CATEnum;

Bool cat_enumerate(void *cbk, char *szName, char *szPath, GF_FileEnumInfo *file_info)
{
	GF_Err e;
	u32 len_rad1;
	char szFileName[GF_MAX_PATH];
	CATEnum *cat_enum = (CATEnum *)cbk;
	len_rad1 = (u32) strlen(cat_enum->szRad1);
	if (strnicmp(szName, cat_enum->szRad1, len_rad1)) return 0;
	if (strlen(cat_enum->szRad2) && !strstr(szName + len_rad1, cat_enum->szRad2) ) return 0;

	strcpy(szFileName, szPath);
	strcat(szFileName, cat_enum->szOpt);

	e = cat_isomedia_file(cat_enum->dest, szFileName, cat_enum->import_flags, cat_enum->force_fps, cat_enum->frames_per_sample, cat_enum->force_cat, cat_enum->align_timelines, cat_enum->allow_add_in_command, GF_FALSE);
	if (e) return 1;
	return 0;
}

GF_Err cat_multiple_files(GF_ISOFile *dest, char *fileName, u32 import_flags, GF_Fraction force_fps, u32 frames_per_sample, Bool force_cat, Bool align_timelines, Bool allow_add_in_command)
{
	CATEnum cat_enum;
	char *sep;

	cat_enum.dest = dest;
	cat_enum.import_flags = import_flags;
	cat_enum.force_fps = force_fps;
	cat_enum.frames_per_sample = frames_per_sample;
	cat_enum.force_cat = force_cat;
	cat_enum.align_timelines = align_timelines;
	cat_enum.allow_add_in_command = allow_add_in_command;

	if (strlen(fileName) >= sizeof(cat_enum.szPath)) {
		GF_LOG(GF_LOG_ERROR, GF_LOG_CONTAINER, ("File name %s is too long.\n", fileName));
		return GF_NOT_SUPPORTED;
	}
	strcpy(cat_enum.szPath, fileName);
	sep = strrchr(cat_enum.szPath, GF_PATH_SEPARATOR);
	if (!sep) sep = strrchr(cat_enum.szPath, '/');
	if (!sep) {
		strcpy(cat_enum.szPath, ".");
		if (strlen(fileName) >= sizeof(cat_enum.szRad1)) {
			GF_LOG(GF_LOG_ERROR, GF_LOG_CONTAINER, ("File name %s is too long.\n", fileName));
			return GF_NOT_SUPPORTED;
		}
		strcpy(cat_enum.szRad1, fileName);
	} else {
		if (strlen(sep + 1) >= sizeof(cat_enum.szRad1)) {
			GF_LOG(GF_LOG_ERROR, GF_LOG_CONTAINER, ("File name %s is too long.\n", (sep + 1)));
			return GF_NOT_SUPPORTED;
		}
		strcpy(cat_enum.szRad1, sep+1);
		sep[0] = 0;
	}
	sep = strchr(cat_enum.szRad1, '*');
	if (!sep) sep = strchr(cat_enum.szRad1, '@');
	if (strlen(sep + 1) >= sizeof(cat_enum.szRad2)) {
		GF_LOG(GF_LOG_ERROR, GF_LOG_CONTAINER, ("File name %s is too long.\n", (sep + 1)));
		return GF_NOT_SUPPORTED;
	}
	strcpy(cat_enum.szRad2, sep+1);
	sep[0] = 0;
	sep = NULL;
	if (gf_sys_old_arch_compat()) sep = strchr(cat_enum.szRad2, '%');
	if (!sep) sep = strchr(cat_enum.szRad2, '#');
	if (!sep) sep = gf_url_colon_suffix(cat_enum.szRad2, '=');
	strcpy(cat_enum.szOpt, "");
	if (sep) {
		if (strlen(sep) >= sizeof(cat_enum.szOpt)) {
			GF_LOG(GF_LOG_ERROR, GF_LOG_CONTAINER, ("Invalid option: %s.\n", sep));
			return GF_NOT_SUPPORTED;
		}
		strcpy(cat_enum.szOpt, sep);
		sep[0] = 0;
	}
	return gf_enum_directory(cat_enum.szPath, 0, cat_enumerate, &cat_enum, NULL);
}

GF_Err cat_playlist(GF_ISOFile *dest, char *playlistName, u32 import_flags, GF_Fraction force_fps, u32 frames_per_sample, Bool force_cat, Bool align_timelines, Bool allow_add_in_command)
{
	GF_Err e;
	FILE *pl = gf_fopen(playlistName, "r");
	if (!pl) {
		GF_LOG(GF_LOG_ERROR, GF_LOG_CONTAINER, ("Failed to open playlist file %s\n", playlistName));
		return GF_URL_ERROR;
	}

	e = GF_OK;
	while (!feof(pl)) {
		char szLine[1000];
		char *url;
		u32 len;
		szLine[0] = 0;
		if (gf_fgets(szLine, 1000, pl) == NULL) break;
		if (szLine[0]=='#') continue;
		len = (u32) strlen(szLine);
		while (len && strchr("\r\n \t", szLine[len-1])) {
			szLine[len-1] = 0;
			len--;
		}
		if (!len) continue;

		url = gf_url_concatenate(playlistName, szLine);
		if (!url) url = gf_strdup(szLine);

		e = cat_isomedia_file(dest, url, import_flags, force_fps, frames_per_sample, force_cat, align_timelines, allow_add_in_command, GF_FALSE);


		if (e) {
			GF_LOG(GF_LOG_ERROR, GF_LOG_CONTAINER, ("Failed to concatenate file %s\n", url));
			gf_free(url);
			break;
		}
		gf_free(url);
	}
	gf_fclose(pl);
	return e;
}

#ifndef GPAC_DISABLE_SCENE_ENCODER
/*
		MPEG-4 encoding
*/

GF_Err EncodeFile(char *in, GF_ISOFile *mp4, GF_SMEncodeOptions *opts, FILE *logs)
{
#ifdef GPAC_DISABLE_SMGR
	return GF_NOT_SUPPORTED;
#else
	GF_Err e;
	GF_SceneLoader load;
	GF_SceneManager *ctx;
	GF_SceneGraph *sg;
#ifndef GPAC_DISABLE_SCENE_STATS
	GF_StatManager *statsman = NULL;
#endif

	sg = gf_sg_new();
	ctx = gf_sm_new(sg);
	memset(&load, 0, sizeof(GF_SceneLoader));
	load.fileName = in;
	load.ctx = ctx;
#ifndef GPAC_DISABLE_SWF_IMPORT
	load.swf_import_flags = swf_flags;
#endif
	load.swf_flatten_limit = (Float) swf_flatten_angle;
	/*since we're encoding we must get MPEG4 nodes only*/
	load.flags = GF_SM_LOAD_MPEG4_STRICT;

	e = gf_sm_load_init(&load);
	if (e<0) {
		gf_sm_load_done(&load);
		M4_LOG(GF_LOG_ERROR, ("Cannot load context %s - %s\n", in, gf_error_to_string(e)));
		goto err_exit;
	}
	e = gf_sm_load_run(&load);
	gf_sm_load_done(&load);

#ifndef GPAC_DISABLE_SCENE_STATS
	if (opts->auto_quant) {
		fprintf(stderr, "Analysing Scene for Automatic Quantization\n");
		statsman = gf_sm_stats_new();
		e = gf_sm_stats_for_scene(statsman, ctx);
		if (!e) {
			const GF_SceneStatistics *stats = gf_sm_stats_get(statsman);
			/*LASeR*/
			if (opts->auto_quant==1) {
				if (opts->resolution > (s32)stats->frac_res_2d) {
					fprintf(stderr, " Given resolution %d is (unnecessarily) too high, using %d instead.\n", opts->resolution, stats->frac_res_2d);
					opts->resolution = stats->frac_res_2d;
				} else if (stats->int_res_2d + opts->resolution <= 0) {
					fprintf(stderr, " Given resolution %d is too low, using %d instead.\n", opts->resolution, stats->int_res_2d - 1);
					opts->resolution = 1 - stats->int_res_2d;
				}
				opts->coord_bits = stats->int_res_2d + opts->resolution;
				fprintf(stderr, " Coordinates & Lengths encoded using ");
				if (opts->resolution < 0) fprintf(stderr, "only the %d most significant bits (of %d).\n", opts->coord_bits, stats->int_res_2d);
				else fprintf(stderr, "a %d.%d representation\n", stats->int_res_2d, opts->resolution);

				fprintf(stderr, " Matrix Scale & Skew Coefficients ");
				if (opts->coord_bits - 8 < stats->scale_int_res_2d) {
					opts->scale_bits = stats->scale_int_res_2d - opts->coord_bits + 8;
					fprintf(stderr, "encoded using a %d.8 representation\n", stats->scale_int_res_2d);
				} else  {
					opts->scale_bits = 0;
					fprintf(stderr, "encoded using a %d.8 representation\n", opts->coord_bits - 8);
				}
			}
#ifndef GPAC_DISABLE_VRML
			/*BIFS*/
			else if (stats->base_layer) {
				GF_AUContext *au;
				GF_CommandField *inf;
				M_QuantizationParameter *qp;
				GF_Command *com = gf_sg_command_new(ctx->scene_graph, GF_SG_GLOBAL_QUANTIZER);
				qp = (M_QuantizationParameter *) gf_node_new(ctx->scene_graph, TAG_MPEG4_QuantizationParameter);

				inf = gf_sg_command_field_new(com);
				inf->new_node = (GF_Node *)qp;
				inf->field_ptr = &inf->new_node;
				inf->fieldType = GF_SG_VRML_SFNODE;
				gf_node_register(inf->new_node, NULL);
				au = gf_list_get(stats->base_layer->AUs, 0);
				gf_list_insert(au->commands, com, 0);
				qp->useEfficientCoding = 1;
				qp->textureCoordinateQuant = 0;
				if ((stats->count_2f+stats->count_2d) && opts->resolution) {
					qp->position2DMin = stats->min_2d;
					qp->position2DMax = stats->max_2d;
					qp->position2DNbBits = opts->resolution;
					qp->position2DQuant = 1;
				}
				if ((stats->count_3f+stats->count_3d) &&  opts->resolution) {
					qp->position3DMin = stats->min_3d;
					qp->position3DMax = stats->max_3d;
					qp->position3DNbBits = opts->resolution;
					qp->position3DQuant = 1;
					qp->textureCoordinateQuant = 1;
				}
				//float quantif is disabled since 2008, check if we want to re-enable it
#if 0
				if (stats->count_float && opts->resolution) {
					qp->scaleMin = stats->min_fixed;
					qp->scaleMax = stats->max_fixed;
					qp->scaleNbBits = 2*opts->resolution;
					qp->scaleQuant = 1;
				}
#endif
			}
#endif
		}
	}
#endif /*GPAC_DISABLE_SCENE_STATS*/

	if (e<0) {
		M4_LOG(GF_LOG_ERROR, ("Error loading file %s\n", gf_error_to_string(e)));
		goto err_exit;
	} else {
		gf_log_cbk prev_logs = NULL;
		if (logs) {
			gf_log_set_tool_level(GF_LOG_CODING, GF_LOG_DEBUG);
			prev_logs = gf_log_set_callback(logs, scene_coding_log);
		}
		opts->src_url = in;
		e = gf_sm_encode_to_file(ctx, mp4, opts);
		if (logs) {
			gf_log_set_tool_level(GF_LOG_CODING, GF_LOG_ERROR);
			gf_log_set_callback(NULL, prev_logs);
		}
	}

	gf_isom_set_brand_info(mp4, GF_ISOM_BRAND_MP42, 1);
	gf_isom_modify_alternate_brand(mp4, GF_ISOM_BRAND_ISOM, GF_TRUE);

err_exit:
#ifndef GPAC_DISABLE_SCENE_STATS
	if (statsman) gf_sm_stats_del(statsman);
#endif
	gf_sm_del(ctx);
	gf_sg_del(sg);
	return e;

#endif /*GPAC_DISABLE_SMGR*/
}
#endif /*GPAC_DISABLE_SCENE_ENCODER*/


#ifndef GPAC_DISABLE_BIFS_ENC
/*
		MPEG-4 chunk encoding
*/

static u32 GetNbBits(u32 MaxVal)
{
	u32 k=0;
	while ((s32) MaxVal > ((1<<k)-1) ) k+=1;
	return k;
}

#ifndef GPAC_DISABLE_SMGR
GF_Err EncodeBIFSChunk(GF_SceneManager *ctx, char *bifsOutputFile, GF_Err (*AUCallback)(GF_ISOSample *))
{
	GF_Err			e;
	u8 *data;
	u32 data_len;
	GF_BifsEncoder *bifsenc;
	GF_InitialObjectDescriptor *iod;
	u32 i, j, count;
	Bool encode_names, delete_bcfg;
	GF_BIFSConfig *bcfg;
	GF_AUContext		*au;
	char szRad[GF_MAX_PATH], *ext;
	char szName[GF_MAX_PATH+100];
	FILE *f;

	strcpy(szRad, bifsOutputFile);
	ext = strrchr(szRad, '.');
	if (ext) ext[0] = 0;


	/* step3: encoding all AUs in ctx->streams starting at AU index 1 (0 is SceneReplace from previous context) */
	bifsenc = gf_bifs_encoder_new(ctx->scene_graph);
	e = GF_OK;

	iod = (GF_InitialObjectDescriptor *) ctx->root_od;
	/*if no iod check we only have one bifs*/
	if (!iod) {
		count = 0;
		for (i=0; i<gf_list_count(ctx->streams); i++) {
			GF_StreamContext *sc = gf_list_get(ctx->streams, i);
			if (sc->streamType == GF_STREAM_OD) count++;
		}
		if (count>1) return GF_NOT_SUPPORTED;
	}

	count = gf_list_count(ctx->streams);
	for (i=0; i<count; i++) {
		u32 nbb;
		Bool delete_esd = GF_FALSE;
		GF_ESD *esd = NULL;
		GF_StreamContext *sc = gf_list_get(ctx->streams, i);

		if (sc->streamType != GF_STREAM_SCENE) continue;

		if (iod) {
			for (j=0; j<gf_list_count(iod->ESDescriptors); j++) {
				esd = gf_list_get(iod->ESDescriptors, j);
				if (esd->decoderConfig && esd->decoderConfig->streamType == GF_STREAM_SCENE) {
					if (!sc->ESID) sc->ESID = esd->ESID;
					if (sc->ESID == esd->ESID) {
						break;
					}
				}
				/*special BIFS direct import from NHNT*/
				else if (gf_list_count(iod->ESDescriptors)==1) {
					sc->ESID = esd->ESID;
					break;
				}
				esd = NULL;
			}
		}

		if (!esd) {
			esd = gf_odf_desc_esd_new(2);
			if (!esd) return GF_OUT_OF_MEM;
			gf_odf_desc_del((GF_Descriptor *) esd->decoderConfig->decoderSpecificInfo);
			esd->decoderConfig->decoderSpecificInfo = NULL;
			esd->ESID = sc->ESID;
			esd->decoderConfig->streamType = GF_STREAM_SCENE;
			delete_esd = GF_TRUE;
		}
		if (!esd->decoderConfig) return GF_OUT_OF_MEM;

		/*should NOT happen (means inputctx is not properly setup)*/
		if (!esd->decoderConfig->decoderSpecificInfo) {
			bcfg = (GF_BIFSConfig*)gf_odf_desc_new(GF_ODF_BIFS_CFG_TAG);
			delete_bcfg = 1;
		}
		/*regular retrieve from ctx*/
		else if (esd->decoderConfig->decoderSpecificInfo->tag == GF_ODF_BIFS_CFG_TAG) {
			bcfg = (GF_BIFSConfig *)esd->decoderConfig->decoderSpecificInfo;
			delete_bcfg = 0;
		}
		/*should not happen either (unless loading from MP4 in which case BIFSc is not decoded)*/
		else {
			bcfg = gf_odf_get_bifs_config(esd->decoderConfig->decoderSpecificInfo, esd->decoderConfig->objectTypeIndication);
			delete_bcfg = 1;
		}
		/*NO CHANGE TO BIFSC otherwise the generated update will not match the input context*/
		nbb = GetNbBits(ctx->max_node_id);
		if (!bcfg->nodeIDbits) bcfg->nodeIDbits=nbb;
		if (bcfg->nodeIDbits<nbb) M4_LOG(GF_LOG_WARNING, ("Warning: BIFSConfig.NodeIDBits TOO SMALL\n"));

		nbb = GetNbBits(ctx->max_route_id);
		if (!bcfg->routeIDbits) bcfg->routeIDbits = nbb;
		if (bcfg->routeIDbits<nbb) M4_LOG(GF_LOG_WARNING, ("Warning: BIFSConfig.RouteIDBits TOO SMALL\n"));

		nbb = GetNbBits(ctx->max_proto_id);
		if (!bcfg->protoIDbits) bcfg->protoIDbits=nbb;
		if (bcfg->protoIDbits<nbb) M4_LOG(GF_LOG_WARNING, ("Warning: BIFSConfig.ProtoIDBits TOO SMALL\n"));

		/*this is the real pb, not stored in cfg or file level, set at EACH replaceScene*/
		encode_names = 0;

		/* The BIFS Config that is passed here should be the BIFSConfig from the IOD */
		gf_bifs_encoder_new_stream(bifsenc, sc->ESID, bcfg, encode_names, 0);
		if (delete_bcfg) gf_odf_desc_del((GF_Descriptor *)bcfg);

		if (!esd->slConfig) esd->slConfig = (GF_SLConfig *) gf_odf_desc_new(GF_ODF_SLC_TAG);
		if (sc->timeScale) esd->slConfig->timestampResolution = sc->timeScale;
		if (!esd->slConfig->timestampResolution) esd->slConfig->timestampResolution = 1000;
		esd->ESID = sc->ESID;
		gf_bifs_encoder_get_config(bifsenc, sc->ESID, &data, &data_len);

		if (esd->decoderConfig->decoderSpecificInfo) gf_odf_desc_del((GF_Descriptor *) esd->decoderConfig->decoderSpecificInfo);
		esd->decoderConfig->decoderSpecificInfo = (GF_DefaultDescriptor *) gf_odf_desc_new(GF_ODF_DSI_TAG);
		esd->decoderConfig->decoderSpecificInfo->data = data;
		esd->decoderConfig->decoderSpecificInfo->dataLength = data_len;
		esd->decoderConfig->objectTypeIndication = gf_bifs_encoder_get_version(bifsenc, sc->ESID);

		for (j=1; j<gf_list_count(sc->AUs); j++) {
			au = gf_list_get(sc->AUs, j);
			e = gf_bifs_encode_au(bifsenc, sc->ESID, au->commands, &data, &data_len);
			if (data) {
				sprintf(szName, "%s-%02d-%02d.bifs", szRad, sc->ESID, j);
				f = gf_fopen(szName, "wb");
				if (gf_fwrite(data, data_len, f) != data_len) e = GF_IO_ERR;
				gf_fclose(f);
				gf_free(data);
			}
			if (e) break;
		}
		if (delete_esd) gf_odf_desc_del((GF_Descriptor*)esd);
	}
	gf_bifs_encoder_del(bifsenc);
	return e;
}
#endif /*GPAC_DISABLE_SMGR*/


#endif /*GPAC_DISABLE_BIFS_ENC*/

/**
\param chunkFile BT chunk to be encoded
\param bifs output file name for the BIFS data
\param inputContext initial BT upon which the chunk is based (shall not be NULL)
\param outputContext: file name to dump the context after applying the new chunk to the input context
                   can be NULL, without .bt
 */
GF_Err EncodeFileChunk(char *chunkFile, char *bifs, char *inputContext, char *outputContext)
{
#if defined(GPAC_DISABLE_SMGR) || defined(GPAC_DISABLE_BIFS_ENC) || defined(GPAC_DISABLE_SCENE_ENCODER) || defined (GPAC_DISABLE_SCENE_DUMP)
	M4_LOG(GF_LOG_WARNING, ("BIFS encoding is not supported in this build of GPAC\n"));
	return GF_NOT_SUPPORTED;
#else
	GF_Err e;
	GF_SceneGraph *sg;
	GF_SceneManager	*ctx;
	GF_SceneLoader load;

	/*Step 1: create context and load input*/
	sg = gf_sg_new();
	ctx = gf_sm_new(sg);
	memset(&load, 0, sizeof(GF_SceneLoader));
	load.fileName = inputContext;
	load.ctx = ctx;
	/*since we're encoding we must get MPEG4 nodes only*/
	load.flags = GF_SM_LOAD_MPEG4_STRICT;
	e = gf_sm_load_init(&load);
	if (!e) e = gf_sm_load_run(&load);
	gf_sm_load_done(&load);
	if (e) {
		M4_LOG(GF_LOG_WARNING, ("Cannot load context %s: %s\n", inputContext, gf_error_to_string(e)));
		goto exit;
	}

	/* Step 2: make sure we have only ONE RAP for each stream*/
	e = gf_sm_aggregate(ctx, 0);
	if (e) goto exit;

	/*Step 3: loading the chunk into the context*/
	memset(&load, 0, sizeof(GF_SceneLoader));
	load.fileName = chunkFile;
	load.ctx = ctx;
	load.flags = GF_SM_LOAD_MPEG4_STRICT | GF_SM_LOAD_CONTEXT_READY;
	e = gf_sm_load_init(&load);
	if (!e) e = gf_sm_load_run(&load);
	gf_sm_load_done(&load);
	if (e) {
		M4_LOG(GF_LOG_WARNING, ("Cannot load scene commands chunk %s: %s\n", chunkFile, gf_error_to_string(e)));
		goto exit;
	}
	M4_LOG(GF_LOG_INFO, ("Context and chunks loaded\n"));

	/* Assumes that the first AU contains only one command a SceneReplace and
	   that is not part of the current chunk */
	/* Last argument is a callback to pass the encoded AUs: not needed here
	   Saving is not handled correctly */
	e = EncodeBIFSChunk(ctx, bifs, NULL);
	if (e) goto exit;


	if (outputContext) {
		u32 d_mode, do_enc;
		char szF[GF_MAX_PATH], *ext;

		/*make random access for storage*/
		e = gf_sm_aggregate(ctx, 0);
		if (e) goto exit;

		/*check if we dump to BT, XMT or encode to MP4*/
		strcpy(szF, outputContext);
		ext = strrchr(szF, '.');
		d_mode = GF_SM_DUMP_BT;
		do_enc = 0;
		if (ext) {
			if (!stricmp(ext, ".xmt") || !stricmp(ext, ".xmta")) d_mode = GF_SM_DUMP_XMTA;
			else if (!stricmp(ext, ".mp4")) do_enc = 1;
			ext[0] = 0;
		}

		if (do_enc) {
			GF_ISOFile *mp4;
			strcat(szF, ".mp4");
			mp4 = gf_isom_open(szF, GF_ISOM_WRITE_EDIT, NULL);
			e = gf_sm_encode_to_file(ctx, mp4, NULL);
			if (e) gf_isom_delete(mp4);
			else gf_isom_close(mp4);
		}
		else e = gf_sm_dump(ctx, szF, GF_FALSE, d_mode);
	}

exit:
	if (ctx) {
		sg = ctx->scene_graph;
		gf_sm_del(ctx);
		gf_sg_del(sg);
	}

	return e;

#endif /*defined(GPAC_DISABLE_BIFS_ENC) || defined(GPAC_DISABLE_SCENE_ENCODER) || defined (GPAC_DISABLE_SCENE_DUMP)*/

}

#endif /*GPAC_DISABLE_MEDIA_IMPORT*/


void sax_node_start(void *sax_cbck, const char *node_name, const char *name_space, const GF_XMLAttribute *attributes, u32 nb_attributes)
{
	char szCheck[100];
	GF_List *imports = sax_cbck;
	u32 i=0;

	/*do not process hyperlinks*/
	if (!strcmp(node_name, "a") || !strcmp(node_name, "Anchor")) return;

	for (i=0; i<nb_attributes; i++) {
		GF_XMLAttribute *att = (GF_XMLAttribute *) &attributes[i];
		if (stricmp(att->name, "xlink:href") && stricmp(att->name, "url")) continue;
		if (att->value[0]=='#') continue;
		if (!strnicmp(att->value, "od:", 3)) continue;
		sprintf(szCheck, "%d", atoi(att->value));
		if (!strcmp(szCheck, att->value)) continue;
		gf_list_add(imports, gf_strdup(att->value) );
	}
}

static Bool wgt_enum_files(void *cbck, char *file_name, char *file_path, GF_FileEnumInfo *file_info)
{
	WGTEnum *wgt = (WGTEnum *)cbck;

	if (!strcmp(wgt->root_file, file_path)) return 0;
	//remove hidden files
	if (file_path[0] == '.') return 0;
	gf_list_add(wgt->imports, gf_strdup(file_path) );
	return 0;
}
static Bool wgt_enum_dir(void *cbck, char *file_name, char *file_path, GF_FileEnumInfo *file_info)
{
	if (!stricmp(file_name, "cvs") || !stricmp(file_name, ".svn") || !stricmp(file_name, ".git")) return GF_FALSE;
	gf_enum_directory(file_path, 0, wgt_enum_files, cbck, NULL);
	gf_enum_directory(file_path, 1, wgt_enum_dir, cbck, NULL);
	return GF_TRUE;
}

GF_ISOFile *package_file(char *file_name, char *fcc, Bool make_wgt)
{
	GF_ISOFile *file = NULL;
	GF_Err e;
	GF_SAXParser *sax;
	GF_List *imports;
	Bool ascii;
	char root_dir[GF_MAX_PATH];
	char *isom_src = NULL;
	u32 i, count, mtype, skip_chars;
	char *type;

	type = gf_xml_get_root_type(file_name, &e);
	if (!type) {
		M4_LOG(GF_LOG_ERROR, ("Cannot process XML file %s: %s\n", file_name, gf_error_to_string(e) ));
		return NULL;
	}
	if (make_wgt) {
		if (strcmp(type, "widget")) {
			M4_LOG(GF_LOG_ERROR, ("XML Root type %s differs from \"widget\" \n", type));
			gf_free(type);
			return NULL;
		}
		gf_free(type);
		type = gf_strdup("application/mw-manifest+xml");
		fcc = "mwgt";
	}
	imports = gf_list_new();


	root_dir[0] = 0;
	if (make_wgt) {
		WGTEnum wgt;
		char *sep = strrchr(file_name, '\\');
		if (!sep) sep = strrchr(file_name, '/');
		if (sep) {
			char c = sep[1];
			sep[1]=0;
			strcpy(root_dir, file_name);
			sep[1] = c;
		} else {
			strcpy(root_dir, "./");
		}
		wgt.dir = root_dir;
		wgt.root_file = file_name;
		wgt.imports = imports;
		gf_enum_directory(wgt.dir, 0, wgt_enum_files, &wgt, NULL);
		gf_enum_directory(wgt.dir, 1, wgt_enum_dir, &wgt, NULL);
		ascii = 1;
	} else {
		sax = gf_xml_sax_new(sax_node_start, NULL, NULL, imports);
		e = gf_xml_sax_parse_file(sax, file_name, NULL);
		ascii = !gf_xml_sax_binary_file(sax);
		gf_xml_sax_del(sax);
		if (e<0) goto exit;
		e = GF_OK;
	}

	if (fcc) {
		mtype = GF_4CC(fcc[0],fcc[1],fcc[2],fcc[3]);
	} else {
		mtype = 0;
		if (!stricmp(type, "svg")) mtype = ascii ? GF_META_TYPE_SVG : GF_META_TYPE_SVGZ;
		else if (!stricmp(type, "smil")) mtype = ascii ? GF_META_TYPE_SMIL : GF_META_TYPE_SMLZ;
		else if (!stricmp(type, "x3d")) mtype = ascii ? GF_META_TYPE_X3D  : GF_META_TYPE_X3DZ  ;
		else if (!stricmp(type, "xmt-a")) mtype = ascii ? GF_META_TYPE_XMTA : GF_META_TYPE_XMTZ;
	}
	if (!mtype) {
		M4_LOG(GF_LOG_ERROR, ("Missing 4CC code for meta name - please use ABCD:fileName\n"));
		e = GF_BAD_PARAM;
		goto exit;
	}


	if (!make_wgt) {
		count = gf_list_count(imports);
		for (i=0; i<count; i++) {
			char *item = gf_list_get(imports, i);
			char *res_url = NULL;

			FILE *test = gf_fopen(item, "rb");
			if (!test) {
				res_url = gf_url_concatenate(file_name, item);
				test = gf_fopen(res_url, "rb");
			}

			if (!test) {
				if (res_url) gf_free(res_url);
				gf_list_rem(imports, i);
				i--;
				count--;
				gf_free(item);
				continue;
			}
			gf_fclose(test);
			if (gf_isom_probe_file(res_url)) {
				if (res_url) gf_free(res_url);
				if (isom_src) {
					M4_LOG(GF_LOG_ERROR, ("Cannot package several IsoMedia files together\n"));
					e = GF_NOT_SUPPORTED;
					goto exit;
				}
				gf_list_rem(imports, i);
				i--;
				count--;
				isom_src = item;
				continue;
			}
			if (res_url) gf_free(res_url);
		}
	}

	if (isom_src) {
		file = gf_isom_open(isom_src, GF_ISOM_OPEN_EDIT, NULL);
	} else {
		file = gf_isom_open("package", GF_ISOM_WRITE_EDIT, NULL);
	}

	e = gf_isom_set_meta_type(file, 1, 0, mtype);
	if (e) goto exit;
	/*add self ref*/
	if (isom_src) {
		e = gf_isom_add_meta_item(file, 1, 0, 1, NULL, isom_src, 0, 0, NULL, NULL, NULL,  NULL, NULL);
		if (e) goto exit;
	}
	e = gf_isom_set_meta_xml(file, 1, 0, file_name, NULL, 0, !ascii);
	if (e) goto exit;

	skip_chars = (u32) strlen(root_dir);
	count = gf_list_count(imports);
	for (i=0; i<count; i++) {
		char *ext, *mime, *encoding, *name, *itemurl;
		char *item = gf_list_get(imports, i);

		name = gf_strdup(item + skip_chars);

		if (make_wgt) {
			while (1) {
				char *sep = strchr(name, '\\');
				if (!sep) break;
				sep[0] = '/';
			}
		}


		mime = encoding = NULL;
		ext = strrchr(item, '.');
		if (!stricmp(ext, ".gz")) ext = strrchr(ext-1, '.');

		if (!stricmp(ext, ".jpg") || !stricmp(ext, ".jpeg")) mime = "image/jpeg";
		else if (!stricmp(ext, ".png")) mime = "image/png";
		else if (!stricmp(ext, ".svg")) mime = "image/svg+xml";
		else if (!stricmp(ext, ".x3d")) mime = "model/x3d+xml";
		else if (!stricmp(ext, ".xmt")) mime = "application/x-xmt";
		else if (!stricmp(ext, ".js")) {
			mime = "application/javascript";
		}
		else if (!stricmp(ext, ".svgz") || !stricmp(ext, ".svg.gz")) {
			mime = "image/svg+xml";
			encoding = "binary-gzip";
		}
		else if (!stricmp(ext, ".x3dz") || !stricmp(ext, ".x3d.gz")) {
			mime = "model/x3d+xml";
			encoding = "binary-gzip";
		}
		else if (!stricmp(ext, ".xmtz") || !stricmp(ext, ".xmt.gz")) {
			mime = "application/x-xmt";
			encoding = "binary-gzip";
		}

		itemurl = gf_url_concatenate(file_name, item);

		e = gf_isom_add_meta_item(file, 1, 0, 0, itemurl ? itemurl : item, name, 0, GF_META_ITEM_TYPE_MIME, mime, encoding, NULL,  NULL, NULL);
		gf_free(name);
		gf_free(itemurl);
		if (e) goto exit;
	}

exit:
	while (gf_list_count(imports)) {
		char *item = gf_list_last(imports);
		gf_list_rem_last(imports);
		gf_free(item);
	}
	gf_list_del(imports);
	if (isom_src) gf_free(isom_src);
	if (type) gf_free(type);
	if (e) {
		if (file) gf_isom_delete(file);
		return NULL;
	}
	return file;
}

GF_Err apply_high_dynamc_range_xml_desc(GF_ISOFile *movie, u32 track, char *file_name)
{
	GF_DOMParser *parser;
	GF_XMLNode *root, *stream;
	GF_Err e;
	u32 i;
	GF_MasteringDisplayColourVolumeInfo mdcv;
	GF_ContentLightLevelInfo clli;

	memset(&mdcv, 0, sizeof(GF_MasteringDisplayColourVolumeInfo));
	memset(&clli, 0, sizeof(GF_ContentLightLevelInfo));

	if (!strcmp(file_name, "none")) {
		for (i=0; i<gf_isom_get_track_count(movie); i++) {
			if (gf_isom_is_video_handler_type(gf_isom_get_media_type(movie, i+1))) {
				gf_isom_set_high_dynamic_range_info(movie, i+1, 1, NULL, NULL);
			}
		}
		return GF_OK;
	}

	parser = gf_xml_dom_new();
	e = gf_xml_dom_parse(parser, file_name, NULL, NULL);
	if (e) {
		M4_LOG(GF_LOG_ERROR, ("Error parsing HDR XML file: Line %d - %s. Abort.\n", gf_xml_dom_get_line(parser), gf_xml_dom_get_error(parser)));
		gf_xml_dom_del(parser);
		return e;
	}
	root = gf_xml_dom_get_root(parser);
	if (!root) {
		M4_LOG(GF_LOG_ERROR, ("Error parsing HDR XML file: no \"root\" found. Abort.\n"));
		gf_xml_dom_del(parser);
		return e;
	}
	if (strcmp(root->name, "HDR")) {
		M4_LOG(GF_LOG_ERROR, ("Error parsing HDR XML file: root name is \"%s\", expecting \"HDR\"\n", root->name));
		gf_xml_dom_del(parser);
		return GF_NON_COMPLIANT_BITSTREAM;
	}

	i = 0;
	while ((stream = gf_list_enum(root->content, &i))) {
		u32 j;
		GF_XMLAttribute* att = NULL;
		GF_XMLNode *box = NULL;

		if (stream->type != GF_XML_NODE_TYPE) continue;
		if (strcmp(stream->name, "Track")) continue;

		if (!track) {
			j = 0;
			while ((att = gf_list_enum(stream->attributes, &j))) {
				if (!strcmp(att->name, "id")) {
					u32 id = parse_u32(att->value, "id");
					track = gf_isom_get_track_by_id(movie, id);
					if (!track) {
						fprintf(stderr, "HDR XML: no track with ID %d, ignoring attribute\n", id);
					}
				}
				else fprintf(stderr, "HDR XML: ignoring track attribute \"%s\"\n", att->name);
			}
		}

		j = 0;
		while ((box = gf_list_enum(stream->content, &j))) {
			u32 k;

			if (box->type != GF_XML_NODE_TYPE) continue;

			if (!strcmp(box->name, "mdcv")) {
				k = 0;
				while ((att = gf_list_enum(box->attributes, &k))) {
					if (!strcmp(att->name, "display_primaries_0_x")) mdcv.display_primaries[0].x = parse_u32(att->value, "display_primaries_0_x");
					else if (!strcmp(att->name, "display_primaries_0_y")) mdcv.display_primaries[0].y = parse_u32(att->value, "display_primaries_0_y");
					else if (!strcmp(att->name, "display_primaries_1_x")) mdcv.display_primaries[1].x = parse_u32(att->value, "display_primaries_1_x");
					else if (!strcmp(att->name, "display_primaries_1_y")) mdcv.display_primaries[1].y = parse_u32(att->value, "display_primaries_1_y");
					else if (!strcmp(att->name, "display_primaries_2_x")) mdcv.display_primaries[2].x = parse_u32(att->value, "display_primaries_2_x");
					else if (!strcmp(att->name, "display_primaries_2_y")) mdcv.display_primaries[2].y = parse_u32(att->value, "display_primaries_2_y");
					else if (!strcmp(att->name, "white_point_x")) mdcv.white_point_x = parse_u32(att->value, "white_point_x");
					else if (!strcmp(att->name, "white_point_y")) mdcv.white_point_y = parse_u32(att->value, "white_point_y");
					else if (!strcmp(att->name, "max_display_mastering_luminance")) mdcv.max_display_mastering_luminance = parse_u32(att->value, "max_display_mastering_luminance");
					else if (!strcmp(att->name, "min_display_mastering_luminance")) mdcv.min_display_mastering_luminance = parse_u32(att->value, "min_display_mastering_luminance");
					else fprintf(stderr, "HDR XML: ignoring box \"%s\" attribute \"%s\"\n", box->name, att->name);
				}
			} else if (!strcmp(box->name, "clli")) {
				k = 0;
				while ((att = gf_list_enum(box->attributes, &k))) {
					if (!strcmp(att->name, "max_content_light_level")) clli.max_content_light_level = parse_u32(att->value, "max_content_light_level");
					else if (!strcmp(att->name, "max_pic_average_light_level")) clli.max_pic_average_light_level = parse_u32(att->value, "max_pic_average_light_level");
					else fprintf(stderr, "HDR XML: ignoring box \"%s\" attribute \"%s\"\n", box->name, att->name);
				}
			} else {
				fprintf(stderr, "HDR XML: ignoring box element \"%s\"\n", box->name);
				continue;
			}
		}

		if (!track) {
			for (i=0; i<gf_isom_get_track_count(movie); i++) {
				if (gf_isom_is_video_handler_type(gf_isom_get_media_type(movie, i+1))) {
					e = gf_isom_set_high_dynamic_range_info(movie, i+1, 1, &mdcv, &clli);
					if (e) break;
				}
			}
		} else {
			e = gf_isom_set_high_dynamic_range_info(movie, track, 1, &mdcv, &clli);
		}
		if (e) {
			M4_LOG(GF_LOG_ERROR, ("HDR XML: error in gf_isom_set_high_dynamic_range_info()\n"));
			break;
		}
	}

	gf_xml_dom_del(parser);
	return e;
}

static GF_Err apply_timestamps(GF_ISOFile *file, GF_ISOTrackID trackID, const char *timestamp_source)
{
	Bool use_dts = GF_FALSE;
	GF_Err e = GF_OK;
	GF_ISOSample samp;
	u32 di;
	u64 data_offset;
	u32 timescale=1000;
	FILE *src = gf_fopen(timestamp_source, "rb");
	if (!src) return GF_URL_ERROR;
	u32 track = gf_isom_get_track_by_id(file, trackID);
	u32 sample_count = gf_isom_get_sample_count(file, track);
	u32 cur_sample = 0;
	u32 min_delta = 0;
	u64 prev_cts=0;
	u64 prev_dts=0;
	u64 last_dts_written=0;
	u32 nb_sample_in=0;
	gf_isom_set_media_timescale(file, track, timescale, 0, 1);
	memset(&samp, 0, sizeof(GF_ISOSample));
	while (!gf_feof(src)) {
		char szLine[100];
		szLine[0] = 0;
		gf_fgets(szLine, 99, src);
		szLine[99]=0;
		u32 len = (u32) strlen(szLine);
		while (len && (strchr(" \n\r", szLine[len-1]) != NULL)) {
			szLine[len-1] = 0;
			len--;
		}
		if (!szLine[0]) continue;

		if (szLine[0] == '#') {
			char *ts_sep=strstr(szLine, "timescale=");
			if (ts_sep) {
				char *sep = strchr(ts_sep+10, ' ');
				if (sep) sep[0]=0;
				timescale = atoi(ts_sep+10);
				gf_isom_set_media_timescale(file, track, timescale, 0, 1);
			}
			continue;
		}
		nb_sample_in++;
		if (cur_sample>=sample_count)
			continue;

		u64 dts, cts;
		char *sep = strchr(szLine, ' ');
		if (sep) {
			use_dts = GF_TRUE;
			sscanf(szLine, LLU" "LLU, &dts, &cts);
		} else {
			sscanf(szLine, LLU, &cts);
			dts = cts;
		}

		if (!cur_sample) {
			prev_dts = dts;
			prev_cts = cts;
			cur_sample++;
			continue;
		}
		if (!use_dts) {
			if (dts>=prev_dts) {
				if (dts==prev_dts) dts++;
				s32 delta = (dts - prev_dts);
				if (!min_delta || (min_delta>delta)) min_delta = delta;
			} else {
				//B-frame after ref
				prev_dts = last_dts_written + 1;
				last_dts_written += 1;
			}
			if (prev_cts<prev_dts) {
				prev_dts = last_dts_written + 1;
				last_dts_written += 1;
			}
		}

		gf_isom_get_sample_info_ex(file, track, cur_sample, &di, &data_offset, &samp);
		samp.DTS = prev_dts;
		if (cur_sample==1) samp.DTS = 0;
		samp.CTS_Offset = (s32)prev_cts - (s32) samp.DTS;
		e = gf_isom_update_sample(file, track, cur_sample, &samp, GF_FALSE);
		if (e) {
			gf_fclose(src);
			return e;
		}

		last_dts_written = prev_dts;
		cur_sample++;
		prev_cts = cts;
		prev_dts = dts;
	}
	//flush last
	gf_isom_get_sample_info_ex(file, track, cur_sample, &di, &data_offset, &samp);
	samp.DTS = prev_dts;
	samp.CTS_Offset = prev_cts;
	samp.CTS_Offset -= prev_dts;
	e = gf_isom_update_sample(file, track, cur_sample, &samp, GF_FALSE);
	if (e) {
		gf_fclose(src);
		return e;
	}

	if (nb_sample_in>sample_count) {
		M4_LOG(GF_LOG_WARNING, ("Too many inputs in timestamp file, ignoring last entries\n"));
	} else if (cur_sample < sample_count) {
		M4_LOG(GF_LOG_WARNING, ("Not enough samples in timestamp file, removing last %u samples\n", sample_count-cur_sample));

		cur_sample++;
		for (di=cur_sample; di<=sample_count; di++) {
			gf_isom_remove_sample(file, track, cur_sample);
		}
	}

	gf_fclose(src);
	return GF_OK;
}



#endif /*GPAC_DISABLE_ISOM_WRITE*/
